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 A146200 #4 Dec 18 2015 18:17:14 %S A146200 0,168,107441,902774,3692732,11295174,28865676,65031988,133191360, %T A146200 253050012,452373900,768956436,1252803248,1968533980 %N A146200 Number of n X n arrays of squares of integers with every (n-3)X(n-3) subblock summing to 6 and every element equal to at least one neighbor. %K A146200 nonn %O A146200 5,2 %A A146200 _R. H. Hardin_ Apr 14 2009