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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 8 of A183729.

LINKS

Table of n, a(n) for n=1..10.

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

Sequence in context: A180106 A190382 A068536 * A237908 A233937 A022201

Adjacent sequences:  A183725 A183726 A183727 * A183729 A183730 A183731

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 06 2011

STATUS

approved

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Last modified October 23 17:32 EDT 2019. Contains 328373 sequences. (Running on oeis4.)