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 A146518 #4 Dec 18 2015 18:17:15 %S A146518 0,50,32254,9541120,4619876326,1767476105845 %N A146518 Number of n X n arrays of squares of integers summing to 24 with every element equal to at least one neighbor. %K A146518 nonn %O A146518 2,2 %A A146518 _R. H. Hardin_ Apr 14 2009