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 A355768 #13 Jul 16 2022 11:50:26
%S A355768 1,1,-2,6,-28,260,-3948,71120,-1392368,29971008,-724981920,
%T A355768 19800726528,-603571233120,20210951379840,-734663902256256,
%U A355768 28785160833254400,-1210241780559067392,54390280325210271744,-2602745536670709682176,132118736078618372579328
%N A355768 E.g.f. satisfies A(x)^(A(x)^2) = 1 + x*A(x).
%F A355768 a(n) = Sum_{k=0..n} (n-2*k+1)^(k-1) * Stirling1(n,k).
%o A355768 (PARI) a(n) = sum(k=0, n, (n-2*k+1)^(k-1)*stirling(n, k, 1));
%Y A355768 Cf. A000142, A349587.
%Y A355768 Cf. A162656, A349650, A355767.
%K A355768 sign
%O A355768 0,3
%A A355768 _Seiichi Manyama_, Jul 16 2022