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 A320148 #12 Oct 08 2018 02:50:54 %S A320148 1,4,4,2,12,16,2,16,28,8,32,40,10,48,48,8,44,40,24,72,48,16,72,64,10, %T A320148 52,80,38,96,112,8,80,108,12,104,128,48,144,136,8,112,104,32,168,136, %U A320148 64,128,96,26,132,116,36,176,208,70,96,192,28,192,232,24,240,176,80 %N A320148 Number of integer solutions to a^2 + b^2 + 3*c^2 + 6*d^2 = n. %C A320148 a(n) > 0 for n >= 0. %H A320148 Seiichi Manyama, <a href="/A320148/b320148.txt">Table of n, a(n) for n = 0..10000</a> %F A320148 G.f.: theta_3(q)^2 * theta_3(q^3) * theta_3(q^6). %Y A320148 Cf. A034896, A272364, A320147. %K A320148 nonn %O A320148 0,2 %A A320148 _Seiichi Manyama_, Oct 06 2018