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 A362238 #9 Apr 12 2023 08:04:59
%S A362238 1,1,2,12,60,460,3900,39438,456288,5896224,85230000,1349017560,
%T A362238 23353941600,437432418696,8828284404576,190867622500800,
%U A362238 4401749312069760,107859517575659520,2798352667710645120,76636669899079699776,2209235394261812751360
%N A362238 Expansion of e.g.f.: 1/(1 - x*(1+x)^x).
%F A362238 a(n) = n! * Sum_{i=0..n} Sum_{j=0..n-i} i^j * Stirling1(n-i-j,j)/(n-i-j)!.
%o A362238 (PARI) my(N=30, x='x+O('x^N)); Vec(serlaplace(1/(1-x*(1+x)^x)))
%Y A362238 Cf. A202152, A362237.
%Y A362238 Cf. A002478, A099234, A099235.
%K A362238 nonn
%O A362238 0,3
%A A362238 _Seiichi Manyama_, Apr 12 2023