A221267 Number of nX3 arrays of occupancy after each element stays put or moves to some king-move neighbor, with no occupancy greater than 2

7, 141, 3119, 71977, 1688295, 39832247, 941623211, 22274020039, 526997663309, 12469419844637, 295047590702713, 6981363653378659, 165192014421623009, 3908750400013375947, 92488301546612746461, 2188444946392166774905

Offset

1,1

Comments

Column 3 of A221269

Links

R. H. Hardin, Table of n, a(n) for n = 1..21

Example

Some solutions for n=3
..1..1..1....0..1..2....0..0..2....1..0..1....1..1..1....1..2..1....2..2..1
..0..2..2....1..1..1....2..0..2....2..0..2....1..2..0....0..1..0....1..0..1
..0..2..0....0..1..2....1..0..2....1..0..2....2..1..0....1..2..1....0..0..2

Crossrefs

Sequence in context: A302912 A191956 A215042 * A070074 A051397 A322064

Adjacent sequences: A221264 A221265 A221266 * A221268 A221269 A221270

Keyword

nonn

Author

R. H. Hardin Jan 08 2013

Status

approved