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 A146545 #4 Dec 18 2015 18:17:15 %S A146545 0,132,48330,29269010,23421826314 %N A146545 Number of n X n arrays of squares of integers summing to 30 with every element equal to at least one neighbor. %K A146545 nonn %O A146545 2,2 %A A146545 _R. H. Hardin_ Apr 14 2009