A221227 Number of nX3 arrays of occupancy after each element moves to some king-move neighbor, with no occupancy greater than 2

2, 137, 2710, 65453, 1516877, 35691850, 840634931, 19825968683, 467700681922, 11033979463946, 260310036348836, 6141004253501805, 144870026550523656, 3417517033348984137, 80619091513823917355, 1901786313951533118427

Offset

1,1

Comments

Column 3 of A221229

Links

R. H. Hardin, Table of n, a(n) for n = 1..24

Example

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

Crossrefs

Sequence in context: A000662 A139907 A195379 * A087619 A157072 A051029

Adjacent sequences: A221224 A221225 A221226 * A221228 A221229 A221230

Keyword

nonn

Author

R. H. Hardin Jan 05 2013

Status

approved