A222095 Number of 3Xn 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, 308, 11698, 439644, 16509768, 619931605, 23277561783, 874033601365, 32818427706942, 1232273510253579, 46269666765829350, 1737343162836648930, 65234125114783960319, 2449424592893411034116, 91971507601402242033646

Offset

1,1

Comments

Row 3 of A222093

Links

R. H. Hardin, Table of n, a(n) for n = 1..22

Example

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

Crossrefs

Sequence in context: A220998 A222091 A193812 * A231124 A081980 A264661

Adjacent sequences: A222092 A222093 A222094 * A222096 A222097 A222098

Keyword

nonn

Author

R. H. Hardin Feb 07 2013

Status

approved