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 A371119 #17 Sep 19 2024 14:43:06
%S A371119 1,0,2,3,52,305,4866,57337,1048776,18547713,407900710,9436057961,
%T A371119 248501026236,7021087254337,217488458525898,7223642070331065,
%U A371119 258233053457437456,9841074705853124609,399304906991091898830,17163110041947804495817,779646387683354742170820
%N A371119 E.g.f. satisfies A(x) = 1 + x*A(x)*(exp(x*A(x)) - 1).
%H A371119 <a href="/index/Res#revert">Index entries for reversions of series</a>
%F A371119 a(n) = (n!)^2 * Sum_{k=0..floor(n/2)} Stirling2(n-k,k)/( (n-k)! * (n-k+1)! ).
%F A371119 E.g.f.: (1/x) * Series_Reversion( x/(1 + x*(exp(x) - 1)) ). - _Seiichi Manyama_, Sep 19 2024
%o A371119 (PARI) a(n) = n!^2*sum(k=0, n\2, stirling(n-k, k, 2)/((n-k)!*(n-k+1)!));
%Y A371119 Cf. A370988, A371115, A371120.
%Y A371119 Cf. A000272, A371139, A376293.
%Y A371119 Cf. A371121.
%K A371119 nonn
%O A371119 0,3
%A A371119 _Seiichi Manyama_, Mar 11 2024