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A221850
Number of nX3 arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, without consecutive moves in the same direction
1
6, 302, 10085, 354670, 12277568, 426752551, 14818941152, 514719294830, 17877010521736, 620906972675376, 21565339027443844, 749008098922831183, 26014567709115430632, 903538668696429777028, 31381728865914983789375
OFFSET
1,1
COMMENTS
Column 3 of A221852
LINKS
EXAMPLE
Some solutions for n=3
..1..0..1....0..2..0....1..1..0....1..1..2....0..1..2....0..1..1....1..0..1
..0..0..1....1..0..0....1..6..0....2..0..0....0..3..0....1..0..1....0..0..1
..1..2..3....3..2..1....0..0..0....0..1..2....2..0..1....2..1..2....0..4..2
CROSSREFS
Sequence in context: A277168 A081321 A159494 * A229148 A333482 A104003
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 27 2013
STATUS
approved