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 A307571 #6 Apr 16 2019 15:28:12
%S A307571 1,1,3,11,38,129,436,1445,4764,15583,50667,163890,527620,1691368,
%T A307571 5400754,17183173,54487190,172235992,542844404,1706169816,5348478123,
%U A307571 16724698483,52174714116,162399459964,504402061533,1563430065203,4836462927829,14933470162894,46026742326000,141614337715832
%N A307571 Expansion of Product_{j>=1} (1 + x^j*Product_{k>=1} (1 + x^k)^(k*j))^j.
%F A307571 G.f.: g(x*g(x)), where g(x) = g.f. of A026007.
%t A307571 nmax = 29; CoefficientList[Series[Product[(1 + x^j Product[(1 + x^k)^(k j), {k, 1, nmax}])^j, {j, 1, nmax}], {x, 0, nmax}], x]
%Y A307571 Cf. A026007, A307323, A307569, A307570.
%K A307571 nonn
%O A307571 0,3
%A A307571 _Ilya Gutkovskiy_, Apr 15 2019