A267746 Number of 7Xn arrays containing n copies of 0..7-1 with every element equal to or 1 greater than any west or northeast neighbors modulo 7 and the upper left element equal to 0.

720, 8, 157, 1008, 13856, 211044, 3562990, 62745587, 1149981951

Offset

1,1

Comments

Row 7 of A267742.

Links

Table of n, a(n) for n=1..9.

Example

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

Crossrefs

Cf. A267742.

Sequence in context: A317660 A267571 A267287 * A267026 A145226 A056467

Adjacent sequences: A267743 A267744 A267745 * A267747 A267748 A267749

Keyword

nonn

Author

R. H. Hardin, Jan 20 2016

Status

approved