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 A146553 #4 Dec 18 2015 18:17:15 %S A146553 0,124,91336,86617756,138995926216 %N A146553 Number of n X n arrays of squares of integers summing to 38 with every element equal to at least one neighbor. %K A146553 nonn %O A146553 2,2 %A A146553 _R. H. Hardin_ Apr 14 2009