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 A146514 #4 Dec 18 2015 18:17:15 %S A146514 4,96,16816,4506134,921762154,339740101635,36832745153541 %N A146514 Number of n X n arrays of squares of integers summing to 20 with every element equal to at least one neighbor. %K A146514 nonn %O A146514 2,1 %A A146514 _R. H. Hardin_ Apr 14 2009