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 A377495 #8 Oct 30 2024 08:04:50
%S A377495 1,1,11,247,8571,404791,24246439,1761559647,150540054611,
%T A377495 14798051914231,1645040516034927,204068062926942655,
%U A377495 27946847973073178587,4188043229601371413911,681707014005609312133175,119774859918869807700934111,22592863584958717501615734051,4553853548371236985017395321335
%N A377495 E.g.f. satisfies A(x) = 1/(1 - A(x)^2 * (exp(x*A(x)^2) - 1)).
%F A377495 a(n) = Sum_{k=0..n} (2*n+3*k)!/(2*n+2*k+1)! * Stirling2(n,k).
%o A377495 (PARI) a(n) = sum(k=0, n, (2*n+3*k)!/(2*n+2*k+1)!*stirling(n, k, 2));
%Y A377495 Cf. A000670, A367162, A377498.
%Y A377495 Cf. A377490.
%K A377495 nonn
%O A377495 0,3
%A A377495 _Seiichi Manyama_, Oct 29 2024