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 A146516 #4 Dec 18 2015 18:17:15 %S A146516 0,124,25390,5990844,2288640858,813680351264,195620550257778 %N A146516 Number of n X n arrays of squares of integers summing to 22 with every element equal to at least one neighbor. %K A146516 nonn %O A146516 2,2 %A A146516 _R. H. Hardin_ Apr 14 2009