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 A320199 #11 Oct 08 2018 02:50:19 %S A320199 1,2,2,4,4,4,8,8,6,6,8,6,12,16,8,16,20,24,26,24,20,24,32,24,32,14,24, %T A320199 40,32,24,24,32,22,64,32,24,40,36,56,40,32,8,48,32,42,56,20,48,72,74, %U A320199 42,72,52,56,88,48,56,40,56,76,76,56,36,96,52,88,112,44,64,92,88 %N A320199 Number of integer solutions to a^2 + 2*b^2 + 4*c^2 + 11*d^2 = n. %C A320199 a(n) > 0 for n >= 0. %H A320199 Seiichi Manyama, <a href="/A320199/b320199.txt">Table of n, a(n) for n = 0..10000</a> %F A320199 G.f.: theta_3(q) * theta_3(q^2) * theta_3(q^4) * theta_3(q^11). %Y A320199 Cf. A320193, A320194, A320195, A320196, A033720, A320197, A320198, A320200, A320201, A320202. %K A320199 nonn %O A320199 0,2 %A A320199 _Seiichi Manyama_, Oct 07 2018