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 A366404 #10 Oct 09 2023 11:20:02
%S A366404 1,2,-1,8,-29,142,-707,3714,-20106,111570,-631046,3624898,-21089378,
%T A366404 124014048,-735906537,4401187158,-26501494072,160532592098,
%U A366404 -977574311830,5981088128586,-36748815585834,226651808352306,-1402726443269229,8708648263017666
%N A366404 G.f. A(x) satisfies A(x) = (1 + x / A(x)^(3/2)) / (1 - x).
%F A366404 a(n) = (-1)^(n-1) * Sum_{k=0..n} binomial(5*k/2-1,k) * binomial(3*k/2-1,n-k) / (5*k/2-1).
%o A366404 (PARI) a(n) = (-1)^(n-1)*sum(k=0, n, binomial(5*k/2-1, k)*binomial(3*k/2-1, n-k)/(5*k/2-1));
%Y A366404 Cf. A366400, A366401, A366402, A366403, A366405, A366406, A366407.
%K A366404 sign
%O A366404 0,2
%A A366404 _Seiichi Manyama_, Oct 09 2023