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 A363776 #13 Jun 22 2023 07:20:44
%S A363776 1,-2,3,-4,5,-6,7,-8,7,-4,-1,8,-17,28,-41,56,-70,80,-83,76,-56,20,35,
%T A363776 -112,210,-324,445,-562,658,-712,699,-590,357,22,-558,1252,-2084,3008,
%U A363776 -3947,4788,-5383,5556,-5116,3864,-1618,-1756,6307,-11956,18454,-25348,31962,-37380
%N A363776 Expansion of 1/(Sum_{k>=0} x^(k^3))^2.
%F A363776 a(0) = 1; a(n) = -(2/n) * Sum_{k=1..n} A363783(k) * a(n-k).
%o A363776 (PARI) my(N=60, x='x+O('x^N)); Vec(1/sum(k=0, N^(1/3), x^k^3)^2)
%Y A363776 Convolution inverse of A173677.
%Y A363776 Column k=2 of A363779.
%Y A363776 Cf. A363783.
%K A363776 sign,easy
%O A363776 0,2
%A A363776 _Seiichi Manyama_, Jun 21 2023