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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.
0
1, 2, 5, 14, 54, 278, 2033, 21781, 345443, 7589059, 200130901, 5749483969
OFFSET
1,2
COMMENTS
Row 7 of A267553.
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 17 2016
STATUS
approved