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 A355104 #9 Jun 19 2022 08:40:54
%S A355104 1,2,8,36,128,-120,-5904,8792,1015808,-7346016,-403678560,9772765552,
%T A355104 226781102016,-17673167204576,72041280334240,38308664521315920,
%U A355104 -1705420687695700992,-64315848872486436736,11313330167773175073408,-326450445457848188386944
%N A355104 E.g.f. A(x) satisfies A(x) = 1 + 2 * x * A(log(1+x)).
%F A355104 a(0) = 1; a(n) = 2 * n * Sum_{k=0..n-1} Stirling1(n-1,k) * a(k).
%F A355104 a(n) = 2 * n * A355096(n-1) for n>0.
%o A355104 (PARI) a_vector(n) = my(v=vector(n+1)); v[1]=1; for(i=1, n, v[i+1]=2*i*sum(j=0, i-1, stirling(i-1, j, 1)*v[j+1])); v;
%Y A355104 Cf. A354729, A355105.
%Y A355104 Cf. A355096.
%K A355104 sign
%O A355104 0,2
%A A355104 _Seiichi Manyama_, Jun 19 2022