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 A146199 #6 Apr 23 2021 10:57:27 %S A146199 0,98,34778,290306,1182610,3573766,9017466,20075266,40694834,76649830, %T A146199 136042186,229866786,372638546,583081894,884882650,1307502306, %U A146199 1887054706,2667245126 %N A146199 Number of n X n arrays of squares of integers with every (n-2) X (n-2) subblock summing to 6 and every element equal to at least one neighbor. %K A146199 nonn %O A146199 4,2 %A A146199 _R. H. Hardin_ Apr 14 2009