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 A206406 Number of (n+1) X (n+1) 0..2 arrays with every 2 X 3 or 3 X 2 subblock having an equal number of clockwise and counterclockwise edge increases. 0

%I

%S 81,5199,2073999,4099250889,38883964087761,1772313933215113017,

%T 388756746462491144596125,410796134340987248242931767083,

%U 2092643007412378548348442168950591087

%N Number of (n+1) X (n+1) 0..2 arrays with every 2 X 3 or 3 X 2 subblock having an equal number of clockwise and counterclockwise edge increases.

%C Diagonal of A206414.

%e Some solutions for n=4:

%e ..0..1..2..1..0....0..2..1..2..1....1..0..1..1..1....2..0..1..2..1

%e ..1..0..1..2..1....1..0..2..1..2....1..1..0..0..0....0..1..2..1..2

%e ..0..0..0..1..0....2..1..0..2..1....1..2..1..0..2....1..0..1..2..1

%e ..2..2..2..0..2....2..1..0..2..2....1..1..2..1..0....2..1..1..1..1

%e ..0..2..2..0..2....0..2..1..0..2....0..0..1..2..1....0..2..2..1..2

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 07 2012

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Last modified December 3 05:05 EST 2021. Contains 349445 sequences. (Running on oeis4.)