A264660 Number of 2Xn arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 2 and columns nondecreasing modulo 5.

1, 3, 16, 148, 2400, 62800, 2150784, 89051520, 4376959488, 264110948352

Offset: 1

Author

R. H. Hardin, Nov 20 2015

Keywords

• nonn

Comments

Row 2 of A264659.

Examples

			Some solutions for n=5
..2..0..6..5..1....0..7..9..1..5....0..8..1..7..5....2..0..5..3..1
..8..4..3..9..7....2..8..4..6..3....2..4..6..3..9....4..6..8..9..7
		

Crossrefs

Cf. A264659.