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A277944 Number of nX7 0..2 arrays with every element plus 1 mod 3 equal to some element at offset (-1,0) (-1,1) (0,-1) (0,1) or (1,0), with upper left element zero. 1

%I

%S 0,9888,5417792,3638916907,2328401610722,1496942405776739,

%T 961449638681471934,617565158334129571727,396670564634000349956925,

%U 254787185951114841200863621,163653378309250439597669572808

%N Number of nX7 0..2 arrays with every element plus 1 mod 3 equal to some element at offset (-1,0) (-1,1) (0,-1) (0,1) or (1,0), with upper left element zero.

%C Column 7 of A277945.

%H R. H. Hardin, <a href="/A277944/b277944.txt">Table of n, a(n) for n = 1..49</a>

%e Some solutions for n=2

%e ..0..2..2..1..0..1..0. .0..2..0..1..1..2..1. .0..1..2..1..0..1..2

%e ..1..1..0..0..2..2..1. .1..0..0..2..0..0..0. .2..2..0..1..2..1..0

%Y Cf. A277945.

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 05 2016

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Last modified July 11 00:56 EDT 2020. Contains 335600 sequences. (Running on oeis4.)