A201140 Number of nX6 0..5 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other

1, 51, 758, 13009, 120096, 1268728, 8360853, 58395657, 309819522, 1599103606, 6891312239, 29648211631, 108584697209, 395584327260, 1292379405268, 4136956355752, 12134954233672, 35217094178978

Offset

1,2

Comments

Column 6 of A201142

Links

Table of n, a(n) for n=1..18.

Example

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

Crossrefs

Sequence in context: A232020 A210176 A224474 * A210079 A201832 A317651

Adjacent sequences: A201137 A201138 A201139 * A201141 A201142 A201143

Keyword

nonn

Author

R. H. Hardin Nov 27 2011

Status

approved