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 A364592 #9 Jul 29 2023 10:51:53
%S A364592 1,2,8,49,365,3001,26193,238119,2230151,21368167,208459419,2063563791,
%T A364592 20675793627,209277092776,2136720896514,21979879393677,
%U A364592 227582114799201,2369983696546858,24806423607475896,260829829404493787,2753744691645428399
%N A364592 G.f. satisfies A(x) = 1/(1-x) + x*(1-x)*A(x)^4.
%F A364592 a(n) = Sum_{k=0..n} binomial(n+k,2*k) * binomial(4*k,k) / (3*k+1).
%o A364592 (PARI) a(n) = sum(k=0, n, binomial(n+k, 2*k)*binomial(4*k, k)/(3*k+1));
%Y A364592 Cf. A014137, A188687.
%Y A364592 Cf. A364594, A364596.
%K A364592 nonn,easy
%O A364592 0,2
%A A364592 _Seiichi Manyama_, Jul 29 2023