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 A146203 #4 Dec 18 2015 18:17:14 %S A146203 0,18,79648,1568158,9251144,34765154,101461384,250731864,549801520, %T A146203 1100971428,2052324440,3609891704,6051280064 %N A146203 Number of n X n arrays of squares of integers with every (n-2)X(n-2) subblock summing to 7 and every element equal to at least one neighbor. %K A146203 nonn %O A146203 4,2 %A A146203 _R. H. Hardin_ Apr 14 2009