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

%S 3275406,1332632711,545678293613,223458785606871,91342748577948857,

%T 37329289780655758477,15245666610426961469352,

%U 6226771909834248684544837,2542604116386182784400024312,1038308180737971719036992527154

%N Number of (n+1)X7 0..3 arrays with the number of clockwise edge increases in every 2X2 subblock equal to two, and every 2X2 determinant nonzero

%C Column 6 of A206318

%H R. H. Hardin, <a href="/A206316/b206316.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 06 2012