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A183733 1/16 the number of (n+1) X 5 0..7 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. 1
9403, 550268, 32555965, 3202350892, 470757143497, 85938883577009, 16327766532728500, 3094892136980310870, 579019469263278106043, 106955380615838654906545, 19539849220501390068072761 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A183738.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..58

EXAMPLE

Some solutions with the first block increasing clockwise for 3 X 5:

..0..1..2..0..2....0..3..2..3..4....4..6..0..3..7....4..6..2..3..4

..7..4..3..6..5....7..6..0..6..5....3..2..1..2..1....3..0..1..7..6

..6..5..1..0..2....3..5..2..3..4....4..5..7..4..5....4..6..2..3..5

...

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

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

CROSSREFS

Sequence in context: A045202 A202645 A183796 * A290424 A210082 A330838

Adjacent sequences:  A183730 A183731 A183732 * A183734 A183735 A183736

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 06 2011

STATUS

approved

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Last modified December 5 11:56 EST 2021. Contains 349557 sequences. (Running on oeis4.)