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 A320197 #11 Oct 08 2018 02:42:37 %S A320197 1,2,2,4,4,4,8,8,6,8,12,8,16,20,8,24,28,20,22,28,16,24,48,8,24,38,24, %T A320197 36,40,20,16,64,22,32,44,24,46,56,36,16,64,28,64,68,36,56,56,72,56,90, %U A320197 26,56,88,44,92,48,48,80,108,48,48,96,40,120,92,16,48,108,52 %N A320197 Number of integer solutions to a^2 + 2*b^2 + 4*c^2 + 9*d^2 = n. %C A320197 a(n) > 0 for n >= 0. %H A320197 Seiichi Manyama, <a href="/A320197/b320197.txt">Table of n, a(n) for n = 0..10000</a> %F A320197 G.f.: theta_3(q) * theta_3(q^2) * theta_3(q^4) * theta_3(q^9). %Y A320197 Cf. A320193, A320194, A320195, A320196, A033720, A320198, A320199, A320200, A320201, A320202. %K A320197 nonn %O A320197 0,2 %A A320197 _Seiichi Manyama_, Oct 07 2018