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 A321302 #13 Nov 07 2018 17:25:27
%S A321302 1,-2,-6,6,14,30,-14,-98,-86,-150,282,486,502,670,-1118,-1226,-4396,
%T A321302 -3814,1326,3834,20354,16330,18334,-6606,-45658,-60762,-121770,-60122,
%U A321302 -22750,160314,303638,435450,542336,162782,-45830,-1090994,-1576378,-2608146,-2408142,-988202,479834
%N A321302 Expansion of Product_{i>=1, j>=1, k>=1, l>=1} (1 - x^(i*j*k*l))/(1 + x^(i*j*k*l)).
%H A321302 Seiichi Manyama, <a href="/A321302/b321302.txt">Table of n, a(n) for n = 0..10000</a>
%F A321302 G.f.: Product_{k>=1} ((1 - x^k)/(1 + x^k))^A007426(k).
%o A321302 (PARI) \\ here b(n) is A007426.
%o A321302 b(n)={vecprod(apply(e->binomial(e+3, 3), factor(n)[,2]))}
%o A321302 seq(n)={Vec(prod(k=1, n, ((1 - x^k)/(1 + x^k) + O(x*x^n))^b(k)))} \\ _Andrew Howroyd_, Nov 06 2018
%Y A321302 Convolution inverse of A321240.
%Y A321302 Cf. A007426, A320908, A321241.
%K A321302 sign
%O A321302 0,2
%A A321302 _Seiichi Manyama_, Nov 03 2018