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 A361091 #12 Mar 14 2023 13:42:56
%S A361091 1,1,3,1,-71,-19,10051,12349,-3185391,-9346247,1797304771,9717361721,
%T A361091 -1582301193527,-13722004186331,2000705907453891,25552516703201461,
%U A361091 -3432004488804778079,-60960914621687232271,7660860906885122096515
%N A361091 E.g.f. satisfies A(x) = exp( x/(1 - x/A(x)^2) ).
%H A361091 Winston de Greef, <a href="/A361091/b361091.txt">Table of n, a(n) for n = 0..380</a>
%F A361091 a(n) = n! * Sum_{k=0..n} (-2*n+2*k+1)^(k-1) * binomial(n-1,n-k)/k!.
%o A361091 (PARI) a(n) = n!*sum(k=0, n, (-2*n+2*k+1)^(k-1)*binomial(n-1, n-k)/k!);
%Y A361091 Cf. A161630, A212722, A212917, A361090, A361092.
%Y A361091 Cf. A361068, A361096.
%K A361091 sign
%O A361091 0,3
%A A361091 _Seiichi Manyama_, Mar 01 2023