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 A293003 #21 Oct 07 2017 22:07:29
%S A293003 1,0,-1,1,-1,-1,2,-1,-2,3,-1,-3,5,-2,-4,7,-3,-6,11,-4,-9,15,-6,-12,21,
%T A293003 -8,-17,29,-11,-23,39,-15,-31,52,-20,-41,70,-26,-55,91,-35,-71,119,
%U A293003 -45,-92,154,-58,-119,198,-75,-152,252,-95,-193,321,-120,-245,404,-152
%N A293003 Expansion of Product_{k>=1} (1 - x^(2*k))/(1 - x^(3*k)).
%H A293003 Seiichi Manyama, <a href="/A293003/b293003.txt">Table of n, a(n) for n = 0..10000</a>
%F A293003 Convolution inverse of A262346.
%Y A293003 Cf. A262346.
%K A293003 sign
%O A293003 0,7
%A A293003 _Seiichi Manyama_, Oct 07 2017