A267627 Number of nX4 arrays of permutations of 4 copies of 0..n-1 with every element equal to or 1 greater than any west neighbor modulo n and the upper left element equal to 0.

1, 35, 265, 2386, 29387, 469605, 8889180, 196362845, 4969038690

Offset: 1

Author

R. H. Hardin, Jan 18 2016

Keywords

• nonn

Comments

Column 4 of A267629.

Examples

			Some solutions for n=4
..0..0..1..1....0..0..1..2....0..0..1..2....0..1..1..2....0..1..2..3
..1..1..2..2....1..1..2..3....3..3..0..1....3..0..1..2....2..3..0..1
..2..3..3..0....0..1..2..3....2..3..3..0....2..3..0..0....0..1..2..2
..2..3..3..0....2..3..3..0....1..1..2..2....1..2..3..3....3..3..0..1
		

Crossrefs

Cf. A267629.