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 A357344 #17 Sep 09 2024 09:33:54 %S A357344 0,1,7,104,2422,77304,3141108,155155580,9027723248,604793361744, %T A357344 45851401106880,3880989671623008,362790690552990720, %U A357344 37120807927059003744,4126551430278515989632,495243629308215934662720,63819561948443247132306432,8789113187481077533462305024 %N A357344 E.g.f. satisfies A(x) = -log(1 - x * exp(A(x))) * exp(2 * A(x)). %H A357344 <a href="/index/Res#revert">Index entries for reversions of series</a> %F A357344 a(n) = Sum_{k=1..n} (n+2*k)^(k-1) * |Stirling1(n,k)|. %F A357344 E.g.f.: Series_Reversion( exp(-x) * (1 - exp(-x * exp(-2*x))) ). - _Seiichi Manyama_, Sep 09 2024 %o A357344 (PARI) a(n) = sum(k=1, n, (n+2*k)^(k-1)*abs(stirling(n, k, 1))); %Y A357344 Cf. A006963, A357343, A357345, A357422. %Y A357344 Cf. A355766. %K A357344 nonn %O A357344 0,3 %A A357344 _Seiichi Manyama_, Sep 25 2022