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%I #5 Mar 31 2012 12:37:10
%S 21940,491162,13475116,404927788,12251680342,372768662926,
%T 11329725297298,344897509718070,10488584427995232,319255468024182244,
%U 9710751056424521182,295543173753212342684,8990520516421539201648
%N Number of (n+1)X7 0..2 arrays with every 2X2 subblock having nonzero determinant and having the same number of clockwise edge increases as its horizontal and vertical neighbors
%C Column 6 of A206128
%H R. H. Hardin, <a href="/A206126/b206126.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..2..1..0..2..1..2..2....0..1..0..1..2..0..2....2..2..1..2..0..1..2
%e ..1..1..1..1..1..1..2....1..0..2..0..1..1..0....1..0..2..1..1..0..1
%e ..2..1..0..1..2..1..1....0..2..1..1..0..2..1....0..2..1..0..2..1..0
%e ..0..1..1..1..1..1..2....2..1..0..2..1..0..2....1..0..2..1..0..2..1
%e ..1..1..2..1..0..1..1....1..0..1..0..2..1..0....2..1..0..2..1..0..2
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 04 2012