%I #6 Jun 17 2021 14:23:13
%S 0,386,173042,47524048,12303458948,3159756711522,810027275568580,
%T 207640367754692812,53220250459310073448,13640617269270340804640,
%U 3496170706479851061894156,896086022476439653341182672
%N Number of n X 7 0..2 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero.
%C Column 7 of A230275.
%H R. H. Hardin, <a href="/A230274/b230274.txt">Table of n, a(n) for n = 1..26</a>
%e Some solutions for n=3
%e ..0..1..0..2..1..0..1....0..0..1..0..0..0..2....0..0..0..1..2..0..2
%e ..1..2..2..1..0..2..2....1..2..2..2..1..1..1....1..1..2..1..0..1..1
%e ..0..0..1..0..0..1..0....1..2..0..1..0..2..1....2..0..1..0..2..2..0
%Y Cf. A230275.
%K nonn
%O 1,2
%A _R. H. Hardin_, Oct 14 2013
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