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 A225074 #4 May 04 2013 20:46:07 %S A225074 0,3,3,9,-2,65,65,73,357,357,480,2201,-6,4426,9911,20871 %N A225074 Location x of the first n x n square of composite Gaussian integers in the first quadrant. %Y A225074 Cf. A225073 (x,y location). %K A225074 sign,more,hard %O A225074 1,2 %A A225074 _T. D. Noe_, May 04 2013