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A183728
1/12 the number of (n+1) X 9 0..5 arrays with every 2 X 2 subblock strictly increasing clockwise or counterclockwise with one decrease, and at least two adjacent blocks having the same increasing direction.
0
88331, 3528126, 130610844, 5355252106, 221403152762, 9546147995730, 460509744129719, 33429749952933774, 4646656755908387234, 935845545638421963156
OFFSET
1,1
COMMENTS
Column 8 of A183729.
EXAMPLE
Some solutions with the first block increasing clockwise for 3 X 9:
..1..2..1..0..1..5..2..5..1....1..2..1..0..1..0..1..4..5
..0..3..4..5..2..4..3..4..3....0..3..4..5..3..4..2..3..2
..1..2..1..0..1..5..2..1..2....1..2..1..0..1..5..1..5..1
...
...R..L..L..R..L..R..L..R.......R..L..L..R..L..R..L..R...
...L..R..R..L..R..L..R..L.......L..R..R..L..R..L..R..L...
CROSSREFS
Cf. A183729.
Sequence in context: A180106 A190382 A068536 * A237908 A233937 A022201
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 06 2011
STATUS
approved