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A207791
Number of (n+1) X (n+1) 0..3 arrays with every 2 X 3 or 3 X 2 subblock having an unequal number of clockwise and counterclockwise edge increases.
0
256, 37408, 22773384, 51169273632, 507960770486000
OFFSET
1,1
COMMENTS
Diagonal of A207799.
EXAMPLE
Some solutions for n=3:
..1..2..1..2....0..2..0..1....1..1..3..2....2..0..3..0....2..0..3..1
..3..0..1..2....2..1..0..0....0..3..3..0....0..2..2..1....1..2..2..3
..1..1..3..2....0..1..1..2....1..0..2..1....0..3..2..0....0..2..0..3
..2..1..0..1....0..0..2..1....1..2..2..0....1..0..2..2....2..2..1..2
CROSSREFS
Sequence in context: A221091 A205458 A206744 * A018798 A017320 A187455
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 20 2012
STATUS
approved