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 A225075 #4 May 04 2013 20:45:45 %S A225075 0,3,12,35,48,72,72,183,500,500,1250,2201,4347,4226,13005,22511 %N A225075 Location y of the first n x n square of composite Gaussian integers in the first quadrant. %Y A225075 Cf. A225073 (x,y location). %K A225075 nonn,more,hard %O A225075 1,2 %A A225075 _T. D. Noe_, May 04 2013