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 A206091 Number of (n+1) X 6 0..2 arrays with every 2 X 3 or 3 X 2 subblock having exactly two counterclockwise and two clockwise edge increases. 1

%I

%S 13608,17976,33792,131904,516912,2156544,8613504,34039392,142331904,

%T 568491264,2246599872,9393905664,37520423424,148275591552,

%U 619997773824,2476347945984,9786189042432,40919853072384,163438964434944

%N Number of (n+1) X 6 0..2 arrays with every 2 X 3 or 3 X 2 subblock having exactly two counterclockwise and two clockwise edge increases.

%C Column 5 of A206094.

%H R. H. Hardin, <a href="/A206091/b206091.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 66*a(n-3) for n>8.

%e Some solutions for n=4:

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 03 2012

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Last modified December 4 16:41 EST 2022. Contains 358563 sequences. (Running on oeis4.)