A267571 Number of 7Xn arrays containing n copies of 0..7-1 with every element equal to or 1 greater than any west or southwest neighbors modulo 7 and the upper left element equal to 0.

720, 2, 3, 3, 8, 17, 2033, 279070, 27767384, 1883165721, 86034010064, 2749223521421

Offset

1,1

Comments

Row 7 of A267562.

Links

Table of n, a(n) for n=1..12.

Example

Some solutions for n=7
..0..0..1..1..2..3..4....0..1..1..2..3..4..5....0..1..2..3..4..5..6
..6..0..1..2..3..4..5....0..1..2..3..4..5..6....1..2..2..3..4..5..6
..0..1..2..3..4..5..6....1..2..3..4..5..6..6....1..2..3..4..5..6..0
..1..2..3..4..5..6..0....1..2..3..4..5..6..0....2..3..4..5..6..0..1
..1..2..3..4..5..6..0....2..3..4..5..6..0..0....3..4..5..6..0..0..1
..1..2..3..4..5..6..6....2..3..4..5..6..0..1....3..4..5..6..0..1..2
..2..3..4..5..5..6..0....3..4..5..6..0..1..2....3..4..5..6..0..1..2

Crossrefs

Cf. A267562.

Sequence in context: A167984 A267429 A317660 * A267287 A267746 A267026

Adjacent sequences: A267568 A267569 A267570 * A267572 A267573 A267574

Keyword

nonn

Author

R. H. Hardin, Jan 17 2016

Status

approved