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 A371146 #9 Mar 13 2024 13:19:55 %S A371146 1,0,2,3,116,690,24714,315840,11919088,250812072,10389272040, %T A371146 310700914920,14351129171400,557402214180240,28831564284582864, %U A371146 1372162923004025880,79345973798740154880,4450055092134985771200,286324089075857021558976 %N A371146 E.g.f. satisfies A(x) = 1/(1 - x*A(x)^2)^(x*A(x)^2). %F A371146 a(n) = n! * Sum_{k=0..floor(n/2)} (2*n+1)^(k-1) * |Stirling1(n-k,k)|/(n-k)!. %o A371146 (PARI) a(n) = n!*sum(k=0, n\2, (2*n+1)^(k-1)*abs(stirling(n-k, k, 1))/(n-k)!); %Y A371146 Cf. A184949, A356786, A356795. %Y A371146 Cf. A371023. %K A371146 nonn %O A371146 0,3 %A A371146 _Seiichi Manyama_, Mar 13 2024