A265003 Number of nX6 arrays of permutations of 6 copies of 0..n-1 with rows and columns nondecreasing.

1, 4, 41, 846, 27000, 1268728, 76714325, 5732148226, 507120480166, 51689513352516

Offset: 1

Author

R. H. Hardin, Nov 29 2015

Keywords

• nonn

Comments

Column 6 of A265005.

Examples

			Some solutions for n=4
..0..0..0..1..1..2....0..0..0..1..2..2....0..0..0..1..1..1....0..0..0..1..1..2
..0..1..1..1..2..3....0..1..1..1..2..2....0..0..0..1..1..2....0..1..1..1..1..2
..0..1..2..2..3..3....0..1..1..2..3..3....1..2..2..2..3..3....0..2..2..3..3..3
..0..2..2..3..3..3....0..2..3..3..3..3....2..2..3..3..3..3....0..2..2..3..3..3
		

Crossrefs

Cf. A265005.