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 A355124 #8 Jun 20 2022 08:36:27
%S A355124 1,1,4,42,1168,84180,15107328,6495857312,6492989426432,
%T A355124 14753072834027424,74941835564789489280,840421638561217307501632,
%U A355124 20603672787268830442103493120,1095629510349075557617215030858112,125563465926494619940863277689861766144
%N A355124 E.g.f. A(x) satisfies A(x) = 1 + x * A(2 * log(1+x)).
%F A355124 a(0) = 1; a(n) = n * Sum_{k=0..n-1} 2^k * Stirling1(n-1,k) * a(k).
%F A355124 a(n) = n * A355133(n-1) for n>0.
%o A355124 (PARI) a_vector(n) = my(v=vector(n+1)); v[1]=1; for(i=1, n, v[i+1]=i*sum(j=0, i-1, 2^j*stirling(i-1, j, 1)*v[j+1])); v;
%Y A355124 Cf. A354729, A355104, A355133.
%K A355124 nonn
%O A355124 0,3
%A A355124 _Seiichi Manyama_, Jun 20 2022