A264708 Number of nX3 arrays of permutations of 0..n*3-1 with rows nondecreasing modulo 3 and columns nondecreasing modulo 6.

1, 8, 152, 4544, 202176, 10964160, 1200365568, 150015836160, 27805483008000

Offset: 1

Author

R. H. Hardin, Nov 21 2015

Keywords

• nonn

Comments

Column 3 of A264709.

Examples

			Some solutions for n=4
..0..6..2....9..0..6....0..6..7....6..7.10....9..6..7....6..0..7....3..6..0
..3..7..8....3..1..2....1..8..2....0..1..4....3..0..2....1..8..2....9..1..7
..9..1..4....4..7.10....3..9.11....8..2..5....4..1.10....9..3.11...10..2..8
.10..5.11....5..8.11....4.10..5....9..3.11...11..8..5...10..4..5....4..5.11
		

Crossrefs

Cf. A264709.