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- #!/usr/bin/perl
- # Integers n such that the n-th prime divides the n-th Pell number (A000129(n)).
- # https://oeis.org/A270493
- # Known terms:
- # 3, 10, 45, 1710, 308961, 601929, 732202, 2214702, 7626372, 13976550, 21971144, 27575700, 207268867,
- use 5.014;
- use ntheory qw(:all);
- local $| = 1;
- my $count = 1;
- forprimes {
- if ((lucas_sequence($_, 2, -1, $count))[0] == 0) {
- print($count, ", ");
- }
- ++$count;
- } 1e11;
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