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 A355064 #65 Jan 06 2023 09:14:23
%S A355064 1,0,2,6,28,210,1248,13020,102128,1248912,13457880,176726880,
%T A355064 2362784928,36609693120,551337892896,9588702417840,171779733546240,
%U A355064 3230529997766400,64714946343904512,1371420774325866240,29953522454811096960,698447624328756610560
%N A355064 Expansion of e.g.f. ( Product_{k>0} 1/(1-x^k)^(1/k) )^x.
%H A355064 Vaclav Kotesovec, <a href="/A355064/b355064.txt">Table of n, a(n) for n = 0..445</a>
%F A355064 a(0) = 1, a(1) = 0; a(n) = Sum_{k=2..n} k! * sigma_0(k-1)/(k-1) * binomial(n-1,k-1) * a(n-k).
%t A355064 a[0] := a[0] = 1; a[1] := a[1] = 0;
%t A355064 a[n_] := a[n] = Sum[Factorial[k]*DivisorSigma[0, k - 1]/(k - 1)*Binomial[n - 1, k - 1]* a[n - k], {k, 2, n}];
%t A355064 Table[a[n], {n, 0, 50}] (* _Sidney Cadot_, Jan 05 2023 *)
%o A355064 (PARI) my(N=30, x='x+O('x^N)); Vec(serlaplace(1/prod(k=1, N, (1-x^k)^(1/k))^x))
%o A355064 (PARI) a_vector(n) = my(v=vector(n+1)); v[1]=1; for(i=1, n, v[i+1]=sum(j=2, i, j!*sigma(j-1, 0)/(j-1)*binomial(i-1, j-1)*v[i-j+1])); v;
%Y A355064 Cf. A354623, A356554.
%Y A355064 Cf. A000005, A066166, A356336, A356564.
%K A355064 nonn
%O A355064 0,3
%A A355064 _Seiichi Manyama_, Aug 12 2022