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A267833
Number of nX3 arrays containing 3 copies of 0..n-1 with every element equal to or 1 greater than any northeast neighbor modulo n and the upper left element equal to 0.
0
1, 10, 91, 924, 10924, 147340, 2247540, 38338680, 723997540, 15008679840, 339055348800
OFFSET
1,2
COMMENTS
Column 3 of A267836.
EXAMPLE
Some solutions for n=4
..0..0..3....0..3..1....0..0..1....0..1..2....0..2..3....0..0..1....0..3..1
..1..0..1....0..1..2....1..1..3....1..2..3....2..3..1....0..2..3....0..1..1
..1..2..2....1..2..2....2..3..2....2..3..0....0..2..0....2..3..1....2..2..2
..3..3..2....3..3..0....0..3..2....0..1..3....3..1..1....3..1..2....3..3..0
CROSSREFS
Cf. A267836.
Sequence in context: A343354 A338678 A347260 * A354380 A015467 A144783
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 21 2016
STATUS
approved