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 A146522 #4 Dec 18 2015 18:17:15 %S A146522 0,132,31837,22671402,12853769226 %N A146522 Number of n X n arrays of squares of integers summing to 28 with every element equal to at least one neighbor. %K A146522 nonn %O A146522 2,2 %A A146522 _R. H. Hardin_ Apr 14 2009