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 A364335 #8 Jul 19 2023 07:48:27
%S A364335 1,2,17,204,2852,43489,701438,11767095,203223146,3589167533,
%T A364335 64524575635,1176860764416,21723084076739,405038036077647,
%U A364335 7617437252889030,144328483391622298,2752414654270742784,52790626691557217602,1017655117382823639414,19706520281177438174530
%N A364335 G.f. satisfies A(x) = (1 + x*A(x)^3) * (1 + x*A(x)^5).
%F A364335 a(n) = Sum_{k=0..n} binomial(3*n+2*k+1,k) * binomial(3*n+2*k+1,n-k) / (3*n+2*k+1).
%o A364335 (PARI) a(n) = sum(k=0, n, binomial(3*n+2*k+1, k)*binomial(3*n+2*k+1, n-k)/(3*n+2*k+1));
%Y A364335 Cf. A215624, A234525, A239108, A364331, A364338.
%K A364335 nonn
%O A364335 0,2
%A A364335 _Seiichi Manyama_, Jul 18 2023