%I #5 Mar 31 2012 12:37:11
%S 112,14990,9841886,31585648103,492612276280514,37329289780655758477,
%T 13716254602125340475868528,24435414110066461941469656297723
%N Number of (n+1)X(n+1) 0..3 arrays with the number of clockwise edge increases in every 2X2 subblock equal to two, and every 2X2 determinant nonzero
%C Diagonal of A206318
%e Some solutions for n=4
%e ..1..1..0..2..1....0..3..2..1..1....1..2..2..1..0....3..3..2..1..1
%e ..3..2..1..3..2....2..1..0..3..2....1..0..3..2..1....2..1..0..3..2
%e ..2..3..2..0..3....3..2..1..0..3....2..1..0..3..2....3..2..1..0..3
%e ..0..1..0..2..0....1..3..2..1..0....0..3..2..0..3....0..3..2..1..0
%e ..1..3..2..0..1....1..0..3..2..1....1..0..3..1..0....2..0..3..2..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 06 2012