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 A381012 #10 Apr 15 2025 17:23:22
%S A381012 1,0,-2,-6,-82,530,-2420,11718,-77458,492834,-1022532,3574714,
%T A381012 -39670180,-172880396,3186538080,-18558899356,150869023214,
%U A381012 -1286538054802,6854805868780,-29675795883872,168219184363308,-618102310289316,-1450440026397056,26462673455854066
%N A381012 a(n) = [(x*y)^n] Product_{k>=1} (1 - x^k - y^k)^n.
%t A381012 Table[SeriesCoefficient[Product[(1 - x^k - y^k)^n, {k, 1, n}], {x, 0, n}, {y, 0, n}], {n, 0, 23}]
%Y A381012 Cf. A008705, A322213, A322214.
%K A381012 sign
%O A381012 0,3
%A A381012 _Ilya Gutkovskiy_, Apr 10 2025