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 A296238 #9 Dec 10 2017 03:52:21
%S A296238 1,0,1,0,0,0,0,1,0,1,0,0,0,0,0,1,0,1,0,0,0,0,1,0,1,0,1,0,1,0,0,0,0,1,
%T A296238 0,1,0,0,0,0,1,1,1,1,0,0,0,1,1,1,1,0,0,0,0,1,0,2,0,1,0,0,1,0,2,0,2,0,
%U A296238 1,0,0,0,1,1,1,1,0,1,0,2,0,2,0,2,1,1,1,0
%N A296238 Expansion of Product_{k>0} (1 + x^(k*(3*k+1)/2)).
%t A296238 nmax = 100; CoefficientList[Series[Product[(1 + x^(k*(3*k+1)/2)), {k, 1, nmax}], {x, 0, nmax}], x] (* _Vaclav Kotesovec_, Dec 10 2017 *)
%o A296238 (PARI) N=66; x='x+O('x^N); Vec(prod(k=1, N, (1+x^(k*(3*k+1)/2))))
%Y A296238 Cf. A218380, A290942, A296237.
%K A296238 nonn
%O A296238 0,58
%A A296238 _Seiichi Manyama_, Dec 09 2017