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 A377450 #10 Oct 29 2024 09:06:59
%S A377450 1,1,9,157,4209,153301,7075209,395858317,26043658209,1970447255941,
%T A377450 168569253106809,16090431675455677,1695423031884496209,
%U A377450 195469637688003331381,24477403062879209570409,3308367753565825806208237,480047805083610542972470209,74429414765710201956179803621
%N A377450 E.g.f. satisfies A(x) = 1/(1 - A(x)^3 * (exp(x) - 1)).
%F A377450 a(n) = Sum_{k=0..n} (4*k)!/(3*k+1)! * Stirling2(n,k).
%o A377450 (PARI) a(n) = sum(k=0, n, (4*k)!/(3*k+1)!*stirling(n, k, 2));
%Y A377450 Cf. A367161, A377451.
%Y A377450 Cf. A377453.
%K A377450 nonn
%O A377450 0,3
%A A377450 _Seiichi Manyama_, Oct 28 2024