A267561 - OEIS

A267561

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

1, 2, 5, 14, 54, 278, 2033, 21781, 345443, 7589059, 200130901, 5749483969

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Row 7 of A267553.

LINKS

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

EXAMPLE

Some solutions for n=4

..0..0..0..1....0..1..1..2....0..0..1..1....0..0..1..1....0..1..2..2

..0..1..1..2....1..2..2..3....0..1..2..2....0..1..2..2....1..2..3..3

..1..2..2..3....2..3..3..4....1..2..3..3....1..2..3..3....2..3..4..4

..2..3..3..4....3..4..4..5....2..3..4..4....2..3..4..4....3..4..5..5

..3..4..4..5....4..5..5..6....3..4..5..5....3..4..5..5....4..5..6..6

..4..5..5..6....5..6..6..0....4..5..6..6....4..5..6..6....5..6..0..0

..5..6..6..6....6..0..0..1....5..6..0..6....5..6..6..0....6..0..1..1

CROSSREFS

Cf. A267553.

Sequence in context: A275825 A081439 A052649 * A267560 A122594 A267559

Adjacent sequences: A267558 A267559 A267560 * A267562 A267563 A267564

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 17 2016

STATUS

approved