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Ahmad J. Masad
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Albert Böschow
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new file: "oeis-research/Albert B\303\266schow/Numbers k where phi(k) divides k - 3/smooth_search.pl"
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Alex Costea
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Alex Ratushnyak
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Alexander Adamchuk
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Alexander R. Povolotsky
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Altug Alkan
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Amarnath Murthy
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new file: oeis-research/Amarnath Murthy/Smallest number sandwiched between two numbers having exactly n prime divisors/generate_fast.pl
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Amiram Eldar
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Antti Karttunen
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new file: oeis-research/Antti Karttunen/Numbers k such that derivative(sigma(k)) = k/search.sf
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Arkadiusz Wesolowski
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new file: oeis-research/Arkadiusz Wesolowski/Numbers k such that phi(binomial(k,2)) is a power of 2/prog.sf
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Arsen Vardanyan
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Artur Jasinski
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new file: oeis-research/Artur Jasinski/a(n) = the smallest prime divisor of A138793(n)/prog.sf
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Benoit Cloitre
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new file: oeis-research/Benoit Cloitre/Where 11^n occurs in n-almost-primes, starting at a(0)=1/prog.sf
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Bernard Schott
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Charles R Greathouse IV
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2^(2^16) - 2^11267 - 1 is prime!
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Charles T. Le
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Colin Barker
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Ctibor O. Zizka
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new file: oeis-research/Amarnath Murthy/Sum of the remainders when n^2 is divided by squares < n/prog.sf
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César Aguilera
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Daniel Hoya
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Daniel Lignon
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new file: oeis-research/Daniel Lignon/Composite numbers for which the harmonic mean of proper divisors is an integer/generate_special_form.sf
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Daniel Suteu
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Donovan Johnson
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new file: oeis-research/Donovan Johnson/Smallest number m such that sigma(m) has exactly n distinct prime factors/upper-bounds.sf
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Eder Vanzei
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Erich Friedman
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new file: oeis-research/Erich Friedman/Squares that remain squares if you decrease every digit by 1/b061844.txt
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Falcon Shapiro
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Fernando Solanet Mayou
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new file: oeis-research/Fernando Solanet Mayou/a(n) is the smallest number that is (zeroless) pandigital in all bases 2 <= k <= n/prog.pl
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G. L. Honaker, Jr.
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Gionata Neri
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new file: oeis-research/Gionata Neri/Least number k > primorial(n) such that omega(k) = n-1/prog.sf
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Gonzalo Martínez
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new file: "oeis-research/Gonzalo Mart\303\255nez/Integers k such that fib(k) + reverse(fib(k)) is prime/prog.sf"
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Greg Dresden
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Howard Berman
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new file: oeis-research/Amiram Eldar/Numbers k such that F(k), F(k+1) and F(k+2) have the same binary weight (A000120), where F(k) is the k-th Fibonacci number (A000045)/prog.pl
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Hugo Pfoertner
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Ilya Gutkovskiy
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Irina Gerasimova
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Ivan N. Ianakiev
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J. Lowell
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new file: oeis-research/J. Lowell/a(1)=1; for n > 1, a(n) is the smallest number with the same number of divisors as 2*a(n-1)/prog.pl
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J. M. Bergot
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J.W.L. (Jan) Eerland
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Jacques Tramu
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James S. DeArmon
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Jaroslav Krizek
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Jason Earls
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new file: oeis-research/Benoit Cloitre/Where 11^n occurs in n-almost-primes, starting at a(0)=1/prog.sf
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Jean-Marc Rebert
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Jeff Burch
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Jeppe Stig Nielsen
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Jianing Song
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new file: oeis-research/Fernando Solanet Mayou/a(n) is the smallest number that is (zeroless) pandigital in all bases 2 <= k <= n/prog.pl
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Jinyuan Wang
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416c61a8d4
new file: oeis-research/Ilya Gutkovskiy/Maximal coefficient of (1 + x^a(1)) * (1 + x^a(1) + x^a(2)) * ... * (1 + x^a(1) + x^a(2) + ... + x^a(n-1))/prog.sf
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Jon E. Schoenfield
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new file: oeis-research/Jason Earls/Largest prime factor of A019518, concatenation of first n primes/prog.sf
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Jonathan Sondow
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Jonathan Vos Post
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Joseph Biberstine
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new file: oeis-research/Joseph Biberstine/Sum of remainders of the n-th prime mod k, for k = 1..n/prog.sf
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José María Grau Ribas
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Jud McCranie
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new file: oeis-research/Amiram Eldar/Number of primitive abundant numbers (A071395) < 10^n/generate.sf
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Julien Peter Benney
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Kevin Batista
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Kevin P. Thompson
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Kevin Ryde
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new file: oeis-research/Kevin Ryde/a(1) = 1 and thereafter a(n) = 2*prime(a(n-1))/prog.sf
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Klaus Brockhaus
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new file: oeis-research/J. M. Bergot/Smallest prime p such that p-1 and p+1 both have n prime factors (with multiplicity)/generate.pl
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Labos Elemer
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Lekraj Beedassy
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Leroy Quet
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new file: oeis-research/Daniel Lignon/Composite numbers for which the harmonic mean of proper divisors is an integer/generate_special_form.sf
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Lorenzo Sauras Altuzarra
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Luis H. Gallardo
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new file: oeis-research/Amiram Eldar/Numbers k such that F(k), F(k+1) and F(k+2) have the same binary weight (A000120), where F(k) is the k-th Fibonacci number (A000045)/prog.pl
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M. F. Hasler
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new file: oeis-research/J.W.L. (Jan) Eerland/Least prime p such that p^n + 6 is the product of n distinct primes/is_squarefree_almost_prime.sf
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M. Farrokhi D. G.
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Maheswara Rao Valluri
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Manuel Valdivia
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Marco Ripà
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new file: oeis-research/Daniel Suteu/Smallest number k > 0 such that bigomega(k^n + 1) = n/prog.sf
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пре 6 месеци |
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Marius A. Burtea
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new file: oeis-research/Kevin Ryde/a(1) = 1 and thereafter a(n) = 2*prime(a(n-1))/prog.sf
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пре 2 година |
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Matthew Campbell
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new file: oeis-research/Amiram Eldar/Odd numbers that are not safe primes such that p-1 | k-1 or k-1 | p-1 for every prime p | 2^(k-1)-1/prog.sf
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Max Alekseyev
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Max Z. Scialabba
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new file: oeis-research/Erich Friedman/Squares that remain squares if you decrease every digit by 1/b061844.txt
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пре 6 месеци |
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Metin Sariyar
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new file: oeis-research/Metin Sariyar/Numbers m such that Sum_{k=1..m} omega(k) = sigma(m)/inverse_sigma_smooth_search.pl
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Michael S. Branicky
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Michel Lagneau
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Michel Marcus
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Muniru A Asiru
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N. J. A. Sloane
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Naohiro Nomoto
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new file: oeis-research/Ilya Gutkovskiy/N-th prime recursive sum/prog.sf
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Nicolas Bělohoubek
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Paolo Galliani
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Paolo P. Lava
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new file: oeis-research/Daniel Suteu/Smallest number k > 0 such that bigomega(k^n + 1) = n/prog.sf
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Paolo Xausa
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new file: factorization-reports/abundant_carmichael+1_factor.txt
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Patrick De Geest
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Paul Vanderveen
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modified: oeis-research/Paul Vanderveen/Smallest prime p == 3 (mod 4) such that all of 2,3,5,...,prime(n) are primitive roots mod p/search.pl
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Pierre CAMI
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new file: oeis-research/Pierre CAMI/Least k such that k * M(n) * M(n+1) + 1 is prime where M(n) = A000668(n)/prog.sf
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Pontus von Brömssen
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Robert FERREOL
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new file: "oeis-research/Gonzalo Mart\303\255nez/Integers k such that fib(k) + reverse(fib(k)) is prime/prog.sf"
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Robert G. Wilson v
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Robert Israel
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new file: oeis-research/Robert Israel/Least k for which A237196(k) = n/prog.pl
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Ryan Propper
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Rémy Sigrist
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Recompress images.
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Scott R. Shannon
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new file: oeis-research/Robert Israel/Least k for which A237196(k) = n/prog.pl
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Seiichi Manyama
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Sidney Cadot
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Sofia Lacerda
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new file: oeis-research/Amiram Eldar/Least number k such that A048105(k) = A048105(k+1) = 2*n, and 0 if it does not exist/prog.pl
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Stefano Spezia
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new file: oeis-research/Derek Orr/Least prime p such that p^n and p^n+1 have the same number of prime factors (counted with multiplicity) or 0 if no such number exists/simple_prog.sf
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T. D. Noe
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new file: oeis-research/T. D. Noe/Smallest odd primitive abundant number having n distinct prime factors/generate.pl
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Tejo Vrush
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new file: oeis-research/Tejo Vrush/a(n) is the least k such that A348172(k) = n or 0 if no such k exists/smooth_generate_quotient.pl
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Vladimir Shevelev
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new file: oeis-research/Fernando Solanet Mayou/a(n) is the smallest number that is (zeroless) pandigital in all bases 2 <= k <= n/prog.pl
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Wesley Ivan Hurt
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Ya-Ping Lu
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new file: pseudoprimes/oeis-pseudoprimes/fermat_with_small_znorder.txt
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Yasutoshi Kohmoto
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Yusuf Gurtas
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new file: oeis-research/Yusuf Gurtas/Smallest prime p for which the absolute value of the difference between the numbers of distinct prime factors of p+1 and p-1 is exactly n/upper-bounds.sf
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Zak Seidov
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new file: oeis-research/Zak Seidov/First number k such that Omega(k) = n and Omega(n - 1) = Omega(n + 1) = n + 1/generate.pl
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Zhao Hui Du
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