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 A349600 #15 Nov 27 2021 04:52:54
%S A349600 1,1,2,3,-20,-320,-2274,5474,487432,8358480,37944240,-2286868848,
%T A349600 -81319780200,-1139790073968,18382692073032,1570867988794680,
%U A349600 42704382709868736,55662087673489920,-49662902468183117760,-2360239974764654675904,-38098700311039336972800
%N A349600 E.g.f. satisfies: A(x)^A(x) = 1 + x*A(x)^2.
%H A349600 Seiichi Manyama, <a href="/A349600/b349600.txt">Table of n, a(n) for n = 0..399</a>
%F A349600 a(n) = Sum_{k=0..n} (2*n-k+1)^(k-1) * Stirling1(n,k).
%o A349600 (PARI) a(n) = sum(k=0, n, (2*n-k+1)^(k-1)*stirling(n, k, 1));
%Y A349600 Cf. A216135, A349601, A349602.
%Y A349600 Cf. A120980, A349587.
%K A349600 sign
%O A349600 0,3
%A A349600 _Seiichi Manyama_, Nov 22 2021