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 A320124 #12 Oct 06 2018 11:59:22 %S A320124 1,4,6,10,20,20,24,40,22,28,56,20,50,80,28,80,84,32,78,80,68,100,120, %T A320124 80,88,124,56,82,136,100,140,200,86,80,192,72,140,240,120,200,248,80, %U A320124 112,176,100,260,224,160,210,172,186,128,272,180,240,400,124,200,280,116 %N A320124 Number of integer solutions to a^2 + b^2 + 2*c^2 + 3*d^2 = n. %C A320124 a(n) > 0 for n >= 0. %H A320124 Seiichi Manyama, <a href="/A320124/b320124.txt">Table of n, a(n) for n = 0..10000</a> %F A320124 G.f.: theta_3(q)^2 * theta_3(q^2) * theta_3(q^3). %Y A320124 Cf. A097057, A320125, A320126, A320127, A320128. %K A320124 nonn %O A320124 0,2 %A A320124 _Seiichi Manyama_, Oct 06 2018