A264711 Number of 3Xn arrays of permutations of 0..n*3-1 with rows nondecreasing modulo 3 and columns nondecreasing modulo 6.

1, 4, 152, 8064, 789696, 120512448, 29928517632

Offset: 1

Author

R. H. Hardin, Nov 21 2015

Keywords

• nonn

Comments

Row 3 of A264709.

Examples

			Some solutions for n=4
..0..1..7.10....0..6.10..7....0..9..1..7....9..6..0..7....0..9..4..7
..6..8..2.11....9..1..4..8....6..4.11..8....3..1..8..2....6..3.10..1
..3..9..4..5....3.11..5..2....3.10..5..2...10..4..5.11....8..5.11..2
		

Crossrefs

Cf. A264709.