A207530 Number of nX3 0..3 arrays avoiding the patterns z z+1 z or z z-1 z in any row or column.

58, 3364, 147006, 6758694, 308746116, 14111752738, 644774919410, 29462512318554, 1346264674676774, 61516602865340590, 2810953601086492756, 128444358844906649114, 5869165947931208621620, 268187017757307027598816

Offset

1,1

Comments

Column 3 of A207535

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A334935 A207278 A207474 * A042625 A250919 A282438

Adjacent sequences: A207527 A207528 A207529 * A207531 A207532 A207533

Keyword

nonn

Author

R. H. Hardin, Feb 18 2012

Status

approved