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A205729
Number of (n+1)X(n+1) 0..2 arrays with every 2 X 2 subblock having the same number of clockwise edge increases as its horizontal neighbors and no 2 X 2 subblock having the same number of counterclockwise edge increases as its vertical neighbors.
0
81, 978, 14715, 223560, 10821462, 276139080, 34742828298, 1546577050248, 556035975944622, 43620596248679868, 46584601562741639715, 6531489127833773748528
OFFSET
1,1
COMMENTS
Diagonal of A205736.
EXAMPLE
Some solutions for n=4:
..2..2..0..1..2....1..1..2..0..0....1..1..0..0..2....0..1..0..1..1
..0..2..0..1..2....2..1..2..0..1....1..2..2..0..2....1..2..1..0..2
..1..0..2..0..1....0..2..1..2..0....2..1..0..2..1....1..2..1..0..1
..0..0..0..0..0....0..2..1..2..0....2..2..2..2..2....0..1..0..2..1
..0..0..0..0..0....2..0..2..0..1....2..2..2..2..2....1..1..0..0..0
CROSSREFS
Sequence in context: A086580 A206269 A236885 * A237226 A237159 A183807
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 30 2012
STATUS
approved