A264730 Number of 3Xn arrays of permutations of 0..n*3-1 with rows nondecreasing modulo 4 and columns nondecreasing modulo 6.

1, 3, 48, 663, 23096, 1602048, 165778944, 13350330368

Offset: 1

Author

R. H. Hardin, Nov 22 2015

Keywords

• nonn

Comments

Row 3 of A264728.

Examples

			Some solutions for n=5
.12..0..2.14..6....8.12..0..6..7....0.12.13..1..7....0.12..1..6..2
..8.13..9..5..7....4.13..1..2..3...10..6.14..2..3....8..9.13..7..3
..4..1.10.11..3....5..9.14.10.11....4..8..9..5.11....4..5.10.14.11
		

Crossrefs

Cf. A264728.