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 A146548 #4 Dec 18 2015 18:17:15 %S A146548 0,18,54004,43110358,49105943708 %N A146548 Number of n X n arrays of squares of integers summing to 33 with every element equal to at least one neighbor. %K A146548 nonn %O A146548 2,2 %A A146548 _R. H. Hardin_ Apr 14 2009