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 A320243 #8 Oct 08 2018 09:00:53 %S A320243 1,6,22,58,130,268,486,796,1198,1682,2268,2980,3876,4896,6164,7686, %T A320243 9378,11496,13486,15784,18560,21370,25108,28636,32168,36570,41260, %U A320243 46610,52184,57260,63264,70452,77930,86224,92708,101016,110058,119948,131060,138456,150596 %N A320243 Number of integer solutions (a_1, a_2, ... , a_8) to the equation a_1^2 + 2*a_2^2 + ... + 8*a_8^2 = 3*n. %H A320243 Seiichi Manyama, <a href="/A320243/b320243.txt">Table of n, a(n) for n = 0..1000</a> %F A320243 a(n) = A320234(3*n). %Y A320243 Cf. A000122, A320234. %K A320243 nonn %O A320243 0,2 %A A320243 _Seiichi Manyama_, Oct 08 2018