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 A265456 #4 Dec 09 2015 10:00:44 %S A265456 1864,502154,161435322,52509347006,16879041018070,5327856426356284, %T A265456 1653688201339124766,505814947757578021828,152811753980421954365094, %U A265456 45684812294133949143632978,13536944058009909827807440148 %N A265456 Number of nX6 0..n+6-2 arrays with each element differing from its horizontal and vertical neighbors by one or two. %C A265456 Column 6 of A265458. %H A265456 R. H. Hardin, <a href="/A265456/b265456.txt">Table of n, a(n) for n = 1..65</a> %e A265456 Some solutions for n=1 %e A265456 ..2..3..2..1..3..5....4..2..3..2..1..3....1..2..0..1..3..1....4..3..4..2..4..2 %Y A265456 Cf. A265458. %K A265456 nonn %O A265456 1,1 %A A265456 _R. H. Hardin_, Dec 09 2015