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 A146342 #4 Dec 18 2015 18:17:14 %S A146342 4,20,6202,3436584,77299240,617036560,3062307644,11508925120, %T A146342 35920299466 %N A146342 Number of n X n arrays of squares of integers with every (n-1)X(n-1) subblock summing to 10 and every element equal to at least one neighbor. %K A146342 nonn %O A146342 3,1 %A A146342 _R. H. Hardin_ Apr 14 2009