This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A373524 #17 Jun 10 2024 10:03:12
%S A373524 1,1,1,1,1,31,181,631,1681,-30239,-219239,-609839,23761,348686911,
%T A373524 2769787021,8683865191,519049441,-13487418759359,-125598814684559,
%U A373524 -446790263130719,15237796321,1447967425273506271,15403882866996490021,61625443167286653271,1295472977069041
%N A373524 Expansion of e.g.f. exp(x * (1 + x^4)^(1/4)).
%F A373524 a(n) = n! * Sum_{k=0..floor(n/4)} binomial(n/4-k,k)/(n-4*k)!.
%F A373524 a(n) == 1 mod 30.
%o A373524 (PARI) a(n) = n!*sum(k=0, n\4, binomial(n/4-k, k)/(n-4*k)!);
%Y A373524 Cf. A190877, A373525, A373526.
%Y A373524 Cf. A373519.
%K A373524 sign
%O A373524 0,6
%A A373524 _Seiichi Manyama_, Jun 08 2024