A267399 Number of 6Xn arrays containing n copies of 0..6-1 with every element equal to or 1 greater than any north, west or northeast neighbors modulo 6 and the upper left element equal to 0.

1, 2, 5, 12, 36, 135, 649, 4189, 33828, 296985, 2634316, 22670355, 186406508, 1469990541, 11163446754, 82316060070

Offset

1,2

Comments

Row 6 of A267392.

Links

Table of n, a(n) for n=1..16.

Example

Some solutions for n=4
..0..0..0..1....0..0..1..1....0..0..0..0....0..0..0..1....0..0..1..2
..0..1..1..2....0..1..2..2....1..1..1..1....1..1..1..2....1..1..2..3
..1..2..2..3....1..2..3..3....2..2..2..2....2..2..2..3....1..2..3..4
..2..3..3..4....2..3..4..4....3..3..3..3....3..3..3..4....2..3..4..5
..3..4..4..5....3..4..5..5....4..4..4..4....4..4..4..5....3..4..5..5
..4..5..5..5....4..5..5..0....5..5..5..5....5..5..5..0....4..5..0..0

Crossrefs

Cf. A267392.

Sequence in context: A287427 A267397 A267398 * A267400 A363064 A052302

Adjacent sequences: A267396 A267397 A267398 * A267400 A267401 A267402

Keyword

nonn

Author

R. H. Hardin, Jan 13 2016

Status

approved