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A183717 1/20 of the number of (n+1) X 8 0..4 arrays with every 2 X 2 subblock strictly increasing clockwise or counterclockwise with one decrease. 1
408, 5776, 71712, 954496, 12606120, 168070828, 2239265280, 29887741084, 398877017736, 5325395568832, 71097798240000, 949288848361824, 12674717188992600, 169233802374938432, 2259618796412155200 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A183719.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

EXAMPLE

Some solutions for 3 X 8:

..0..4..0..4..0..4..0..4....1..0..2..0..1..0..1..0....3..0..3..0..4..0..4..0

..2..3..1..2..1..2..1..2....3..4..3..4..2..4..2..3....2..1..2..1..3..1..3..2

..0..4..0..4..0..3..0..3....2..0..1..0..1..0..1..0....3..4..3..0..4..0..4..1

...

...L..R..L..R..L..R..L.......L..R..L..R..L..R..L.......R..L..R..L..R..L..R...

...R..L..R..L..R..L..R.......R..L..R..L..R..L..R.......L..R..L..R..L..R..L...

CROSSREFS

Sequence in context: A234702 A234697 A337795 * A285767 A282479 A163024

Adjacent sequences:  A183714 A183715 A183716 * A183718 A183719 A183720

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 06 2011

STATUS

approved

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Last modified June 27 23:08 EDT 2022. Contains 354903 sequences. (Running on oeis4.)