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 A146555 #4 Dec 18 2015 18:17:15 %S A146555 4,128,120672,102504963,209207867680 %N A146555 Number of n X n arrays of squares of integers summing to 40 with every element equal to at least one neighbor. %K A146555 nonn %O A146555 2,1 %A A146555 _R. H. Hardin_ Apr 14 2009