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 A363781 #10 Jun 22 2023 07:20:59
%S A363781 1,-1,3,-10,35,-126,462,-1716,6427,-24220,91718,-348712,1330238,
%T A363781 -5088916,19515660,-75000600,288772795,-1113688667,4301387580,
%U A363781 -16635049690,64410064110,-249659926890,968651123520,-3761601535620,14619516646150,-56861702382576
%N A363781 a(n) = [x^n] 1/(Sum_{k>=0} x^(k^3))^n.
%Y A363781 Main diagonal of A363779.
%Y A363781 Cf. A291700.
%K A363781 sign
%O A363781 0,3
%A A363781 _Seiichi Manyama_, Jun 21 2023