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A265003
Number of nX6 arrays of permutations of 6 copies of 0..n-1 with rows and columns nondecreasing.
0
1, 4, 41, 846, 27000, 1268728, 76714325, 5732148226, 507120480166, 51689513352516
OFFSET
1,2
COMMENTS
Column 6 of A265005.
EXAMPLE
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.
Sequence in context: A192547 A006129 A244437 * A193363 A284276 A327026
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 29 2015
STATUS
approved