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 A278206 #4 Nov 15 2016 12:24:59 %S A278206 0,601,34869,1674402,93838003,5306819216,297169006604,16636687338399, %T A278206 931945034345185,52205261260655693,2924300169544392520, %U A278206 163806092390120341088,9175698877050626080778,513982345733812946152984 %N A278206 Number of nX6 0..1 arrays with every element both equal and not equal to some elements at offset (-1,-1) (-1,0) (-1,1) (0,-1) (0,1) (1,-1) (1,0) or (1,1), with upper left element zero. %C A278206 Column 6 of A278208. %H A278206 R. H. Hardin, <a href="/A278206/b278206.txt">Table of n, a(n) for n = 1..210</a> %e A278206 Some solutions for n=3 %e A278206 ..0..0..1..0..0..1. .0..0..1..1..0..1. .0..1..1..1..0..1. .0..1..1..1..0..1 %e A278206 ..0..1..1..0..0..1. .0..1..1..0..1..1. .0..0..0..0..1..0. .0..1..0..1..0..1 %e A278206 ..0..1..1..0..0..0. .1..1..1..0..0..0. .1..1..0..1..0..0. .0..0..1..0..1..0 %Y A278206 Cf. A278208. %K A278206 nonn %O A278206 1,2 %A A278206 _R. H. Hardin_, Nov 15 2016