A267428 Number of 6Xn arrays containing n copies of 0..6-1 with every element equal to or 1 greater than any west, northeast or northwest neighbors modulo 6 and the upper left element equal to 0.

120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 15, 192, 3064, 47143, 596666, 6335112, 57993446, 465509399, 3352084272, 21950707367, 132484328850

Offset

1,1

Comments

Row 6 of A267425.

Links

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

Example

A solution for n=13
..0..0..0..0..1..1..2..2..3..3..3..4..4
..0..0..1..1..1..2..2..3..3..4..4..4..5
..0..1..1..1..2..2..3..3..4..4..5..5..5
..1..1..1..2..2..3..3..4..4..5..5..5..5
..1..1..2..2..3..3..4..4..5..5..5..0..0
..2..2..2..3..3..4..4..5..5..0..0..0..0

Crossrefs

Cf. A267425.

Sequence in context: A242836 A229031 A221406 * A156739 A326798 A090217

Adjacent sequences: A267425 A267426 A267427 * A267429 A267430 A267431

Keyword

nonn

Author

R. H. Hardin, Jan 14 2016

Status

approved