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 A236933 #10 Oct 05 2018 09:02:03 %S A236933 1,6,12,8,6,24,24,0,12,30,24,24,10,36,72,16,18,96,84,24,48,108,72,48, %T A236933 40,78,168,32,12,168,120,48,60,144,96,48,78,84,216,64,24,240,144,24, %U A236933 48,168,144,96,70,114,252,64,84,312,240,48,120,252,168,120,32 %N A236933 Number of integer solutions to a^2 + b^2 + c^2 + 12*d^2 = n. %H A236933 Seiichi Manyama, <a href="/A236933/b236933.txt">Table of n, a(n) for n = 0..10000</a> %F A236933 G.f.: theta_3(q)^3*theta_3(q^12), where theta_3() is the Jacobi theta function. - _Ilya Gutkovskiy_, Aug 03 2018 %p A236933 See A236924. %Y A236933 Different from A005875. %Y A236933 For number of solutions to a^2+b^2+c^2+k*d^2=n for k=1,2,3,4,5,6,7,8,12 see A000118, A236928, A236926, A236923, A236930, A236931, A236932, A236927, A236933. %K A236933 nonn %O A236933 0,2 %A A236933 _N. J. A. Sloane_, Feb 16 2014