A265004 Number of nX7 arrays of permutations of 7 copies of 0..n-1 with rows and columns nondecreasing.

1, 4, 54, 1720, 97341, 8360853, 1001060834, 155796077603, 30055866217955

Offset: 1

Author

R. H. Hardin, Nov 29 2015

Keywords

• nonn

Comments

Column 7 of A265005.

Examples

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

Crossrefs

Cf. A265005.