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 A320149 #12 Oct 08 2018 03:50:01 %S A320149 1,2,6,12,14,24,20,16,30,14,40,60,36,72,48,16,62,36,42,108,72,96,100, %T A320149 48,68,42,120,120,112,168,48,64,126,40,108,192,98,216,180,48,136,84, %U A320149 160,252,180,168,144,96,132,114,126,216,216,312,200,80,240,72,280,348,112 %N A320149 Number of integer solutions to a^2 + 2*b^2 + 2*c^2 + 2*d^2 = n. %C A320149 a(n) > 0 for n >= 0. %H A320149 Seiichi Manyama, <a href="/A320149/b320149.txt">Table of n, a(n) for n = 0..10000</a> %F A320149 G.f.: theta_3(q) * theta_3(q^2)^3. %Y A320149 Cf. A320150, A236924, A320151, A320152, A320153. %K A320149 nonn %O A320149 0,2 %A A320149 _Seiichi Manyama_, Oct 06 2018