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 A375871 #14 Sep 01 2024 10:49:41
%S A375871 1,3,30,543,14493,515001,22930869,1229340027,77151412902,
%T A375871 5551075890453,450607640485269,40745592546015495,4061982705195354033,
%U A375871 442649982865922396337,52351468801767526253538,6678605910447082873015923,914198409310749883430655441
%N A375871 E.g.f. satisfies A(x) = exp( 3 * (exp(x*A(x)) - 1) ).
%F A375871 E.g.f.: B(x)^3, where B(x) is the e.g.f. of A349683.
%F A375871 a(n) = 3 * Sum_{k=0..n} (3*n+3)^(k-1) * Stirling2(n,k).
%o A375871 (PARI) a(n) = 3*sum(k=0, n, (3*n+3)^(k-1)*stirling(n, k, 2));
%Y A375871 Cf. A349683, A375870, A375872.
%Y A375871 Cf. A027710, A370057.
%K A375871 nonn
%O A375871 0,2
%A A375871 _Seiichi Manyama_, Sep 01 2024