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 A320128 #11 Oct 06 2018 12:00:16 %S A320128 1,4,6,8,12,8,8,18,14,24,40,32,40,40,32,28,36,64,46,72,72,16,56,40,40, %T A320128 88,72,80,82,64,44,64,86,96,128,144,64,64,136,44,136,160,80,144,128, %U A320128 120,92,128,104,164,158,96,168,80,144,160,168,108,104,232,108,168,192,82 %N A320128 Number of integer solutions to a^2 + b^2 + 2*c^2 + 7*d^2 = n. %C A320128 a(n) > 0 for n >= 0. %H A320128 Seiichi Manyama, <a href="/A320128/b320128.txt">Table of n, a(n) for n = 0..10000</a> %F A320128 G.f.: theta_3(q)^2 * theta_3(q^2) * theta_3(q^7). %Y A320128 Cf. A097057, A320124, A320125, A320126, A320127. %K A320128 nonn %O A320128 0,2 %A A320128 _Seiichi Manyama_, Oct 06 2018