A207477 Number of n X 6 0..3 arrays avoiding the patterns z z+1 z or z z-1 z in any row, column or nw-se diagonal.

2902, 8421604, 9918542118, 14048417801822, 19555176286561332, 27133109124370438420, 37628798991659309387420

Offset

1,1

Comments

Column 6 of A207479.

Links

Table of n, a(n) for n=1..7.

Example

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

Crossrefs

Cf. A207479.

Sequence in context: A235102 A252267 A207281 * A207533 A054828 A153412

Adjacent sequences: A207474 A207475 A207476 * A207478 A207479 A207480

Keyword

nonn

Author

R. H. Hardin, Feb 18 2012

Status

approved