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 A356786 #14 Aug 28 2022 04:24:55
%S A356786 1,0,2,3,92,510,15114,174300,5558944,103712616,3672530280,96397602840,
%T A356786 3830335035240,129817630491120,5796134828193696,239906921239210680,
%U A356786 11996259216566469120,584024600798956215360,32523678395272329425856
%N A356786 E.g.f. satisfies A(x) = 1/(1 - x * A(x))^(x * A(x)^2).
%F A356786 a(n) = n! * Sum_{k=0..floor(n/2)} (n+k+1)^(k-1) * |Stirling1(n-k,k)|/(n-k)!.
%o A356786 (PARI) a(n) = n!*sum(k=0, n\2, (n+k+1)^(k-1)*abs(stirling(n-k, k, 1))/(n-k)!);
%Y A356786 Cf. A184949, A349559, A356787.
%Y A356786 Cf. A355766.
%K A356786 nonn
%O A356786 0,3
%A A356786 _Seiichi Manyama_, Aug 27 2022