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 A362246 #9 Apr 13 2023 08:29:52
%S A362246 1,1,1,7,13,81,391,1093,18537,577,1013131,-54339,39429853,424162753,
%T A362246 -4130181873,137131757701,-1733851435439,29708533549953,
%U A362246 -337960798083053,3890007865959661,-11844138798049659,-662440203084569279,30135319297423429783
%N A362246 Expansion of e.g.f. exp(x * exp(-x * (exp(-x) - 1))).
%F A362246 a(n) = n! * Sum_{i=0..n} (-1)^(n-i) * ( Sum_{j=0..n-i} i^j * Stirling2(n-i-j,j)/(n-i-j)! )/i!.
%o A362246 (PARI) my(N=30, x='x+O('x^N)); Vec(serlaplace(exp(x*exp(-x*(exp(-x)-1)))))
%Y A362246 Cf. A362244, A362245, A362247.
%Y A362246 Cf. A347726.
%K A362246 sign
%O A362246 0,4
%A A362246 _Seiichi Manyama_, Apr 12 2023