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 A146294 #4 Dec 18 2015 18:17:14 %S A146294 4,6,13372,569370,4490816,20143086,67388028,187458768,458291208, %T A146294 1017185004,2092976212,4050199948,7448027128,13117064768 %N A146294 Number of n X n arrays of squares of integers with every (n-1)X(n-1) subblock summing to 8 and every element equal to at least one neighbor. %K A146294 nonn %O A146294 3,1 %A A146294 _R. H. Hardin_ Apr 14 2009