A380444 - OEIS

%I #11 Feb 01 2025 08:45:26

%S 1,693,1386,1463,1881,2379,2926,3762,4389,4758,6930,8778,9516,11895,

%T 13167,16653,18018,19032,23790,24180,25641,26169,26334,33306,37271,

%U 38064,40443,43890,45201,52338,52668,54717,57057,57912,59475,61380,64233,65835,70224,73150,75777,78507,79002,85932,100947,105336,107415

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

%H Antti Karttunen, <a href="/A380444/b380444.txt">Table of n, a(n) for n = 1..3333</a>

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

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

%Y Square roots of A380448.

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

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

%K nonn,changed

%O 1,2

%A _Antti Karttunen_, Jan 26 2025