A229773 Number of n X n 0..5 arrays with rows in lexicographically nondecreasing order and columns in nonincreasing order

6, 266, 103222, 637396928, 81937334158292, 245200063296427870294, 18316874320807782299001320802

Offset

1,1

Comments

Column 5 of A229774

Links

Table of n, a(n) for n=1..7.

Example

Some solutions for n=3
..4..1..0....2..1..1....4..2..0....1..1..0....3..2..2....2..1..0....2..0..0
..4..1..4....2..5..1....4..4..2....2..1..4....3..5..0....3..4..2....3..5..2
..5..3..0....5..3..1....5..1..2....3..3..3....5..2..1....5..2..1....4..1..4

Crossrefs

Sequence in context: A033289 A244493 A221900 * A193983 A348701 A233234

Adjacent sequences: A229770 A229771 A229772 * A229774 A229775 A229776

Keyword

nonn

Author

R. H. Hardin, Sep 29 2013

Status

approved