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 A223708 #3 Apr 09 2013 17:18:08 %S A223708 1,1,1,1,1,1,2,1,1,2,2,2,1,1,2,2,2,2,3,2,1,2,3,2,2,2,3,3,2,2,3,2,1,3, %T A223708 4,2,2,2,3,3,2,4,4,2,2,2,5,4,2,2,3,4,2,2,5,2,2,4,6,4,2,2,3,3,3,4,4,3, %U A223708 2,4,6,3,2,2,4,4,3,3,6,4,1,5,6,4,3,2,4 %N A223708 Nonzero terms in A107628; related to quadratic forms ax^2 + bxy + cy^2. %H A223708 T. D. Noe, <a href="/A223708/b223708.txt">Table of n, a(n) for n = 1..5000</a> %Y A223708 Cf. A107628. %K A223708 nonn %O A223708 1,7 %A A223708 _T. D. Noe_, Apr 09 2013