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A180842
Number of nX4 arrays containing 4 indistinguishable copies of 1..n with lexicographical ordering of rows strictly increasing and columns strictly decreasing
0
1, 0, 44, 14284, 8554238, 9893281255, 19903018463755
OFFSET
1,3
COMMENTS
Column 4 of A180843
EXAMPLE
Some solutions for 3X4
..2..1..1..1....2..1..1..1....2..1..1..1....2..1..1..1....2..1..1..1
..2..3..2..1....2..3..2..1....2..3..2..1....2..3..2..1....2..3..3..1
..2..3..3..3....3..2..3..3....3..3..3..2....3..3..2..3....3..3..2..2
...
..2..1..1..1....2..1..1..1....2..1..1..1....2..1..1..1....2..2..1..1
..2..3..2..2....2..3..3..2....2..3..3..2....2..3..3..2....2..2..3..1
..3..3..3..1....3..2..1..3....3..3..1..2....3..3..2..1....3..1..3..3
...
..2..2..1..1....2..1..1..1....2..1..1..1....2..2..1..1....2..2..1..1
..2..2..3..3....3..2..2..1....3..3..2..1....3..1..2..1....3..1..2..1
..3..1..3..1....3..3..2..3....3..3..2..2....3..2..3..3....3..3..3..2
CROSSREFS
Sequence in context: A266853 A323315 A007105 * A172753 A268425 A183749
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 20 2010
STATUS
approved