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 A369785 #9 Feb 01 2024 08:29:54
%S A369785 1,1,5,32,252,2368,25865,321310,4461684,68329293,1142114917,
%T A369785 20663072796,401891071075,8355591197398,184796601094141,
%U A369785 4329517995684305,107060130166069859,2785248872828731497,76017344650249268158,2171058618712177987046
%N A369785 Expansion of e.g.f. exp( (exp(3*(exp(x)-1))-1)/3 ).
%F A369785 a(n) = Sum_{k=0..n} Stirling2(n,k) * A004212(k).
%o A369785 (PARI) my(N=20, x='x+O('x^N)); Vec(serlaplace(exp((exp(3*(exp(x)-1))-1)/3)))
%Y A369785 Cf. A000258, A369784.
%Y A369785 Cf. A004212, A049425.
%K A369785 nonn
%O A369785 0,3
%A A369785 _Seiichi Manyama_, Feb 01 2024