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A183714 1/20 of the number of (n+1) X 5 0..4 arrays with every 2 X 2 subblock strictly increasing clockwise or counterclockwise with one decrease. 1
29, 174, 950, 5362, 30113, 169560, 954496, 5374440, 30261345, 170394226, 959449106, 5402445266, 30419982145, 171288302164, 964487232600, 5430818438104, 30579761182213, 172188006484798, 969553341271046 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A183719.

LINKS

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

FORMULA

Empirical: a(n) = 6*a(n-1) + 5*a(n-2) - 42*a(n-3) - 2*a(n-4) + 84*a(n-5) - 20*a(n-6) - 46*a(n-7) + 19*a(n-8) + 2*a(n-9) - a(n-10).

EXAMPLE

Some solutions for 3 X 5:

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

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

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

...

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

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

CROSSREFS

Sequence in context: A238599 A033219 A142407 * A042640 A140573 A165613

Adjacent sequences:  A183711 A183712 A183713 * A183715 A183716 A183717

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 06 2011

STATUS

approved

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Last modified August 14 06:54 EDT 2022. Contains 356110 sequences. (Running on oeis4.)