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 A366358 #11 Oct 08 2023 10:50:25
%S A366358 1,2,-5,40,-319,2908,-28151,284908,-2977115,31875709,-347884084,
%T A366358 3855802690,-43283239649,491083601339,-5622489637406,64877058557080,
%U A366358 -753705528179423,8808460811302729,-103487549564845199,1221565052783161764,-14480208437556590345
%N A366358 G.f. satisfies A(x) = 1/(1 - x) + x/A(x)^3.
%F A366358 a(n) = (-1)^(n-1) * Sum_{k=0..n} binomial(4*k-1,k) * binomial(4*k-1,n-k)/(4*k-1).
%o A366358 (PARI) a(n) = (-1)^(n-1)*sum(k=0, n, binomial(4*k-1, k)*binomial(4*k-1, n-k)/(4*k-1));
%Y A366358 Cf. A007317, A199475, A349289, A349290, A349291, A349292, A349293, A366356, A366357, A366359.
%Y A366358 Cf. A364407, A366327, A366365.
%K A366358 sign
%O A366358 0,2
%A A366358 _Seiichi Manyama_, Oct 08 2023