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 A146530 #4 Dec 18 2015 18:17:15 %S A146530 0,180,28232,25474838,17363131000 %N A146530 Number of n X n arrays of squares of integers summing to 29 with every element equal to at least one neighbor. %K A146530 nonn %O A146530 2,2 %A A146530 _R. H. Hardin_ Apr 14 2009