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A267428
Number of 6Xn arrays containing n copies of 0..6-1 with every element equal to or 1 greater than any west, northeast or northwest neighbors modulo 6 and the upper left element equal to 0.
0
120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 15, 192, 3064, 47143, 596666, 6335112, 57993446, 465509399, 3352084272, 21950707367, 132484328850
OFFSET
1,1
COMMENTS
Row 6 of A267425.
EXAMPLE
A solution for n=13
..0..0..0..0..1..1..2..2..3..3..3..4..4
..0..0..1..1..1..2..2..3..3..4..4..4..5
..0..1..1..1..2..2..3..3..4..4..5..5..5
..1..1..1..2..2..3..3..4..4..5..5..5..5
..1..1..2..2..3..3..4..4..5..5..5..0..0
..2..2..2..3..3..4..4..5..5..0..0..0..0
CROSSREFS
Cf. A267425.
Sequence in context: A242836 A229031 A221406 * A156739 A326798 A090217
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 14 2016
STATUS
approved