A264561 Number of 2Xn arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 2 and columns nondecreasing modulo 3.

1, 3, 24, 316, 6080, 149824, 5728896, 259780608, 14154310656, 1054215834624

Offset: 1

Author

R. H. Hardin, Nov 17 2015

Keywords

• nonn

Comments

Row 2 of A264560.

Examples

			Some solutions for n=4
..0..2..4..3....6..5..1..3....6..0..7..3....0..2..6..4....6..2..4..0
..6..5..7..1....0..2..4..7....2..4..1..5....7..5..3..1....3..5..1..7
		

Crossrefs

Cf. A264560.