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 A300458 #4 Mar 06 2018 17:50:52
%S A300458 1,-1,-1,-10,11,374,9792,183847,3469427,65038049,1195396233,
%T A300458 19667738452,189089161562,-6219720781782,-606316892131934,
%U A300458 -35104997710496175,-1795953382595105853,-88223902016631657740,-4283800987347611165184,-207864171877269042498096,-10102590396625592962089500
%N A300458 a(n) = [x^n] Product_{k=1..n} 1/(1 + x^k)^(n^k).
%e A300458 The table of coefficients of x^k in expansion of Product_{k>=1} 1/(1 + x^k)^(n^k) begins:
%e A300458 n = 0: (1), 0, 0, 0, 0, 0, ...
%e A300458 n = 1: 1, (-1), 0, -1, 1, -1, ...
%e A300458 n = 2: 1, -2, (-1), -4, 3, -2, ...
%e A300458 n = 3: 1, -3, -3, (-10), 6, 15, ...
%e A300458 n = 4: 1, -4, -6, -20, (11), 104, ...
%e A300458 n = 5: 1, -5, -10, -35, 20, (374), ...
%t A300458 Table[SeriesCoefficient[Product[1/(1 + x^k)^(n^k), {k, 1, n}], {x, 0, n}], {n, 0, 20}]
%Y A300458 Cf. A081362, A252654, A255526, A252782, A255672, A270917, A270922, A281266, A281267, A281268, A283333, A292805, A300456, A300457.
%K A300458 sign
%O A300458 0,4
%A A300458 _Ilya Gutkovskiy_, Mar 06 2018