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 A363275 #6 May 26 2023 08:50:46
%S A363275 1,-1,1,-1,1,-1,1,-1,0,1,-2,3,-4,5,-6,7,-7,6,-4,1,3,-9,16,-24,32,-39,
%T A363275 44,-46,44,-35,18,8,-43,86,-135,187,-238,280,-304,300,-259,171,-28,
%U A363275 -174,435,-746,1088,-1431,1736,-1952,2017,-1864,1425,-641,-527,2086,-4002
%N A363275 Expansion of 1 / Sum_{k>=0} x^(k*(3*k - 2)).
%t A363275 nmax = 56; CoefficientList[Series[1/Sum[x^(k (3 k - 2)), {k, 0, nmax}], {x, 0, nmax}], x]
%Y A363275 Cf. A000567, A106507, A195848, A308806, A317665, A322800, A361979, A363149.
%K A363275 sign
%O A363275 0,11
%A A363275 _Ilya Gutkovskiy_, May 25 2023