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 A275226 #4 Jul 20 2016 18:27:12 %S A275226 122,7776,10483,63267,640250,6534900,67550874,716735348,7605814181, %T A275226 80496567059,853665236582,9065417241908,96259306327146, %U A275226 1022092822313136,10854887473630824,115290893519800111,1224514266243749236 %N A275226 Number of nX6 0..2 arrays with no element equal to any value at offset (-2,-1) (-2,1) or (-1,0) and new values introduced in order 0..2. %C A275226 Column 6 of A275228. %H A275226 R. H. Hardin, <a href="/A275226/b275226.txt">Table of n, a(n) for n = 1..210</a> %e A275226 Some solutions for n=4 %e A275226 ..0..1..2..1..2..1. .0..1..2..0..0..0. .0..1..2..1..1..1. .0..1..2..1..0..1 %e A275226 ..1..2..1..2..1..2. .2..2..1..2..1..2. .1..2..1..2..0..0. .1..2..1..2..1..0 %e A275226 ..2..1..0..1..0..0. .0..1..2..1..2..1. .2..1..2..0..2..2. .2..1..2..1..2..2 %e A275226 ..1..2..1..2..1..2. .1..0..0..2..1..2. .1..2..1..2..1..1. .0..0..1..2..1..0 %Y A275226 Cf. A275228. %K A275226 nonn %O A275226 1,1 %A A275226 _R. H. Hardin_, Jul 20 2016