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%I #6 Dec 13 2015 21:28:59
%S 12105120,9604042208,7932406245672,6623662914493232,
%T 5553852508380267184,4664832957577714246616,3920972890172486310882016,
%U 3296755941481489235686937392
%N Number of (n+1) X 7 0..3 arrays with every 2 X 3 or 3 X 2 subblock having an equal number of clockwise and counterclockwise edge increases.
%C Column 6 of A206752.
%e Some solutions for n=4:
%e ..3..2..1..0..2..1..0....1..3..1..3..3..3..1....3..1..1..2..0..2..0
%e ..3..3..2..1..3..2..1....1..1..3..2..3..0..2....1..0..0..1..2..1..2
%e ..1..1..3..2..0..3..2....1..1..1..3..1..2..3....1..1..0..0..1..3..0
%e ..1..1..1..3..2..0..3....0..1..2..0..2..1..2....0..1..0..2..3..1..2
%e ..3..1..2..0..3..1..0....0..0..1..3..0..2..0....1..1..0..2..2..3..0
%K nonn
%O 1,1
%A _R. H. Hardin_, Feb 12 2012
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