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%I
%S 256,36384,43894936,343128343904,16261882009570952,
%T 4664832957577714246616
%N Number of (n+1) X (n+1) 0..3 arrays with every 2 X 3 or 3 X 2 subblock having an equal number of clockwise and counterclockwise edge increases.
%C Diagonal of A206752.
%e Some solutions for n=4:
%e ..0..0..0..0..1....2..2..3..0..3....0..0..3..0..0....1..0..0..0..0
%e ..0..1..0..3..0....3..2..2..3..0....1..1..0..3..3....3..1..0..1..0
%e ..2..3..1..0..0....1..3..2..3..3....3..3..1..0..3....1..3..1..3..1
%e ..2..2..3..2..0....1..3..3..3..0....1..1..3..1..0....1..1..3..0..2
%e ..0..0..1..3..2....3..2..2..2..3....0..1..1..2..1....0..0..1..2..0
%K nonn
%O 1,1
%A _R. H. Hardin_, Feb 12 2012
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