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 A216577 #14 Aug 11 2015 16:05:19 %S A216577 1,1,0,0,1,0,0,0,0,1,1,1,0,0,1,0,1,0,0,1,0,0,0,0,0,1,1,0,0,0,0,0,0,0, %T A216577 0,1,1,0,0,0,1,1,0,0,1,0,1,0,0,2,0,0,0,0,0,0,1,0,0,1,0,0,0,0,1,1,0,0, %U A216577 0,0,0,0,0,0,1,0,1,0,0,0,0,1,0,0,0,0,0,0,0,1,1,2,0,0,1,0,0,0,0,1 %N A216577 Number of nonnegative integer solutions to the equation x^2 + 10*y^2 = n. %Y A216577 Cf. A020673, A033201. %K A216577 nonn %O A216577 0,50 %A A216577 _V. Raman_, Sep 08 2012 %E A216577 Corrected by _T. D. Noe_ and _N. J. A. Sloane_, Sep 10 2012