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

6, 302, 10085, 354670, 12277568, 426752551, 14818941152, 514719294830, 17877010521736, 620906972675376, 21565339027443844, 749008098922831183, 26014567709115430632, 903538668696429777028, 31381728865914983789375

Offset

1,1

Comments

Column 3 of A221852

Links

R. H. Hardin, Table of n, a(n) for n = 1..27

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

Adjacent sequences: A221847 A221848 A221849 * A221851 A221852 A221853

Keyword

nonn

Author

R. H. Hardin Jan 27 2013

Status

approved