trizen 7ea6dd432d new file: oeis-research/Erich Friedman/Squares that remain squares if you decrease every digit by 1/b061844.txt před 6 měsíci
..
Squares that remain squares if you decrease every digit by 1 7ea6dd432d new file: oeis-research/Erich Friedman/Squares that remain squares if you decrease every digit by 1/b061844.txt před 6 měsíci
a(1) = a(2) = 1, a(n) is largest prime factor of concatenation of a(n - 2) and a(n - 1) 8fc34c482e Update. před 2 roky