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A221851 Number of nX4 arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, without consecutive moves in the same direction 0
13, 3437, 465305, 67228149, 9607602488, 1374453486067, 196583533871825, 28117377558933453 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A221852

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A159357 A221885 A134159 * A221924 A292109 A337147

Adjacent sequences:  A221848 A221849 A221850 * A221852 A221853 A221854

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 27 2013

STATUS

approved

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Last modified August 11 12:12 EDT 2022. Contains 356065 sequences. (Running on oeis4.)