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%I #7 Apr 17 2022 20:36:26
%S 24,300,2728,64224,566288,32546974,262845336,51670233144,345767017112,
%T 315611607627526,1611191289726456,8005845542601521472
%N Number of (n+1) X (n+1) 0..2 arrays with the number of clockwise edge increases in every 2 X 2 subblock equal to one, and every 2 X 2 determinant nonzero.
%C Diagonal of A206010.
%e Some solutions for n=4
%e ..1..1..1..1..1....2..1..0..2..0....2..1..0..2..2....2..1..0..2..1
%e ..0..1..0..1..2....1..1..2..2..2....0..1..1..1..2....2..2..2..2..0
%e ..1..1..1..1..1....2..1..1..2..1....1..1..2..1..1....1..2..0..2..2
%e ..2..1..0..1..2....2..2..1..1..1....1..2..2..2..0....2..2..2..2..0
%e ..0..1..1..1..1....0..2..2..1..0....2..2..0..2..2....1..2..0..2..2
%Y Cf. A206010.
%K nonn
%O 1,1
%A _R. H. Hardin_, Feb 02 2012
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