A267336 Number of 7Xn arrays containing n copies of 0..7-1 with every element equal to or 1 greater than any southwest or northwest neighbors modulo 7 and the upper left element equal to 0.

720, 0, 0, 0, 0, 0, 1, 46, 29393, 6837388, 613275874, 23205147788, 464526211444, 5767760740531, 42557114596251, 237454733444334

Offset

1,1

Comments

Row 7 of A267328.

Links

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

Example

Some solutions for n=8
..0..1..1..2..3..4..5..6....0..1..2..3..3..4..5..6....0..1..2..3..4..4..5..6
..0..0..1..2..3..4..5..6....0..1..2..3..4..4..5..6....0..1..2..3..3..4..5..6
..6..0..1..2..3..4..5..6....0..1..2..3..4..5..5..6....0..1..2..2..3..4..5..6
..6..0..1..2..3..4..5..5....0..1..2..3..4..5..6..6....0..1..1..2..3..4..5..6
..6..0..1..2..3..4..4..5....0..1..2..3..4..5..6..0....0..0..1..2..3..4..5..5
..6..0..1..2..3..3..4..5....1..1..2..3..4..5..6..0....6..0..1..2..3..4..5..6
..6..0..1..2..2..3..4..5....1..2..2..3..4..5..6..0....6..0..1..2..3..4..5..6

Crossrefs

Cf. A267328.

Sequence in context: A101997 A139195 A269124 * A167984 A267429 A317660

Adjacent sequences: A267333 A267334 A267335 * A267337 A267338 A267339

Keyword

nonn

Author

R. H. Hardin, Jan 13 2016

Status

approved