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 A230274 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. 1

%I

%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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Last modified November 29 18:13 EST 2022. Contains 358431 sequences. (Running on oeis4.)