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Number of nX4 0..2 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value (x(i,j)+1) mod 3 and at least one element with value (x(i,j)-1) mod 3, and upper left element zero
1

%I #4 Nov 03 2013 06:16:26

%S 0,62,1074,43566,1444702,50554618,1740086452,60169326764,

%T 2078169462590,71798088654394,2480349543197958,85688184666384078,

%U 2960239863178974748,102266505677802748874,3532968690414317025252,122052364457303115849762

%N Number of nX4 0..2 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value (x(i,j)+1) mod 3 and at least one element with value (x(i,j)-1) mod 3, and upper left element zero

%C Column 4 of A231031

%H R. H. Hardin, <a href="/A231027/b231027.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 03 2013