A206317 - OEIS

%I #5 Mar 31 2012 12:37:11

%S 25637095,23019152735,20808377921080,18792437854613234,

%T 16933907482183625564,15245666610426961469352,

%U 13716254602125340475868528,12336975902231208201294106142,11094395430478243136970514760806

%N Number of (n+1)X8 0..3 arrays with the number of clockwise edge increases in every 2X2 subblock equal to two, and every 2X2 determinant nonzero

%C Column 7 of A206318

%H R. H. Hardin, <a href="/A206317/b206317.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

%e ..2..0..2..1..1..1..2..3....3..0..2..2..1..1..0..2....2..0..2..0..3..0..3..0

%e ..0..2..1..0..3..2..1..1....1..2..1..0..3..2..1..3....2..1..3..1..0..1..0..1

%e ..2..1..3..2..1..0..3..2....3..0..2..1..0..3..2..0....3..2..0..3..1..2..1..2

%e ..3..2..0..3..2..1..0..3....2..2..3..2..1..0..3..1....2..1..1..0..2..0..2..1

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 06 2012