A222091 Number of nX3 arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, without move-in move-out left turns

8, 306, 11698, 439979, 16518325, 620167586, 23285438194, 874320487561, 32829136547878, 1232675333611674, 46284755942965861, 1737909791864677612, 65255401994426759727, 2450223514629565888639, 92001505833953763778608

Offset

1,1

Comments

Column 3 of A222093

Links

R. H. Hardin, Table of n, a(n) for n = 1..55

Example

Some solutions for n=3
..0..1..1....1..0..1....0..1..2....0..2..0....0..1..1....1..0..0....0..0..1
..1..0..3....2..3..0....0..1..2....4..0..0....0..2..1....1..3..0....3..1..1
..0..2..1....0..2..0....0..1..2....0..0..3....2..0..2....0..3..1....0..2..1

Crossrefs

Sequence in context: A317457 A352591 A220998 * A193812 A222095 A231124

Adjacent sequences: A222088 A222089 A222090 * A222092 A222093 A222094

Keyword

nonn

Author

R. H. Hardin Feb 07 2013

Status

approved