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A267393
Number of nX(n+1) arrays of permutations of n+1 copies of 0..n-1 with every element equal to or 1 greater than any north, west or northeast neighbors modulo n and the upper left element equal to 0.
0
1, 10, 12, 36, 135, 649, 4277, 39472, 505780, 9112713
OFFSET
1,2
COMMENTS
Superdiagonal 1 of A267392.
EXAMPLE
Some solutions for n=4
..0..1..2..2..3....0..0..1..1..2....0..0..0..1..2....0..1..1..2..2
..1..2..3..3..0....0..1..1..2..3....1..1..1..2..3....1..1..2..3..3
..2..3..0..0..1....1..2..2..3..3....2..2..2..3..0....1..2..3..3..0
..3..0..1..1..2....2..3..3..0..0....3..3..3..0..1....2..3..0..0..0
CROSSREFS
Cf. A267392.
Sequence in context: A132313 A324745 A367148 * A349160 A248481 A266700
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 13 2016
STATUS
approved