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 A146092 #4 Dec 18 2015 18:17:13 %S A146092 1,235,1894,5928,14762,31448,59802,104420,170678,264732,393518,564752, %T A146092 786930,1069328,1422002,1855788,2382302,3013940,3763878,4646072, %U A146092 5675258,6866952,8237450,9803828,11583942,13596428,15860702 %N A146092 Number of n X n arrays of squares of integers with every (n-2)X(n-2) subblock summing to 4 and every element equal to at least one neighbor. %K A146092 nonn %O A146092 4,2 %A A146092 _R. H. Hardin_ Apr 14 2009