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 A294356 #13 Oct 30 2017 10:00:02
%S A294356 1,-1,1,-5,23,-119,619,-4759,48145,-476657,4249961,-48286061,
%T A294356 691331431,-9132207655,117900772963,-2025161870159,37607411624609,
%U A294356 -628236985455329,10768798391659345,-215626810984559317,4751529623277906871,-105427459848063440471
%N A294356 E.g.f.: Product_{k>0} (1+x^k)^(-1/k).
%t A294356 nmax = 20; CoefficientList[Series[Product[1/(1+x^k)^(1/k), {k, 1, nmax}], {x, 0, nmax}], x] * Range[0, nmax]! (* _Vaclav Kotesovec_, Oct 29 2017 *)
%o A294356 (PARI) N=66; x='x+O('x^N); Vec(serlaplace(prod(k=1, N, 1/(1+x^k)^(1/k))))
%Y A294356 Cf. A028342, A028343, A168243.
%K A294356 sign
%O A294356 0,4
%A A294356 _Seiichi Manyama_, Oct 29 2017