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 A369784 #9 Feb 01 2024 08:29:50
%S A369784 1,1,4,21,137,1068,9663,99249,1137858,14373531,198031153,2951536030,
%T A369784 47270242621,808917666365,14720125466652,283667520561633,
%U A369784 5768057979319853,123364873473674732,2767400573883314755,64950007415991458989,1591227433994704322322
%N A369784 Expansion of e.g.f. exp( (exp(2*(exp(x)-1))-1)/2 ).
%F A369784 a(n) = Sum_{k=0..n} Stirling2(n,k) * A004211(k).
%o A369784 (PARI) my(N=30, x='x+O('x^N)); Vec(serlaplace(exp((exp(2*(exp(x)-1))-1)/2)))
%Y A369784 Cf. A000258, A369785.
%Y A369784 Cf. A000085, A004211, A346417.
%K A369784 nonn
%O A369784 0,3
%A A369784 _Seiichi Manyama_, Feb 01 2024