A380444 Numbers k for which A339792(k^2) = 0, where A339792 is the third coefficient of the lindep transform of sigma.

1, 693, 1386, 1463, 1881, 2379, 2926, 3762, 4389, 4758, 6930, 8778, 9516, 11895, 13167, 16653, 18018, 19032, 23790, 24180, 25641, 26169, 26334, 33306, 37271, 38064, 40443, 43890, 45201, 52338, 52668, 54717, 57057, 57912, 59475, 61380, 64233, 65835, 70224, 73150, 75777, 78507, 79002, 85932, 100947, 105336, 107415

Offset

1,2

Links

Antti Karttunen, Table of n, a(n) for n = 1..3333

Formula

a(n) = A000196(A380448(n)).

Prog

(PARI) is_A380444(n) = A380445(n^2);

Crossrefs

Square roots of A380448.

Cf. A000196, A000203, A339792, A380445, A380450 (odd terms).

Cf. also A322154 (not a subsequence, although most terms are included also here).

Sequence in context: A292833 A004240 A004241 * A322154 A380450 A129913

Adjacent sequences: A380441 A380442 A380443 * A380445 A380446 A380447

Keyword

nonn,new

Author

Antti Karttunen, Jan 26 2025

Status

approved