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%I #4 Nov 08 2016 12:34:56
%S 0,7734,2072344,699721024,233160226732,77589535205794,
%T 25821185682305524,8592958824701790896,2859602832674813814112,
%U 951630300604165753555590,316687355530488310683471550,105388483387006153868422307268
%N Number of 6Xn 0..2 arrays with every element plus 1 mod 3 equal to some element at offset (-1,-1) (-1,0) (-1,1) (0,-1) (0,1) or (1,0), with upper left element zero.
%C Row 6 of A278014.
%H R. H. Hardin, <a href="/A278019/b278019.txt">Table of n, a(n) for n = 1..176</a>
%e Some solutions for n=2
%e ..0..2. .0..1. .0..1. .0..2. .0..1. .0..1. .0..1. .0..1. .0..1. .0..1
%e ..1..1. .1..2. .0..2. .1..0. .2..2. .1..2. .1..2. .0..2. .0..2. .0..2
%e ..0..0. .1..2. .2..0. .1..2. .0..1. .0..1. .0..0. .2..2. .1..0. .2..1
%e ..2..2. .1..0. .1..1. .0..2. .2..1. .2..2. .2..2. .0..1. .1..2. .0..2
%e ..0..1. .1..2. .0..2. .2..0. .2..0. .2..0. .1..1. .2..1. .2..1. .0..2
%e ..0..0. .1..0. .1..0. .2..1. .1..2. .1..1. .0..2. .2..0. .0..2. .1..1
%Y Cf. A278014.
%K nonn
%O 1,2
%A _R. H. Hardin_, Nov 08 2016
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