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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 0
1, 51, 758, 13009, 120096, 1268728, 8360853, 58395657, 309819522, 1599103606, 6891312239, 29648211631, 108584697209, 395584327260, 1292379405268, 4136956355752, 12134954233672, 35217094178978 (list; graph; refs; listen; history; text; internal format)
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 A201212

Adjacent sequences:  A201137 A201138 A201139 * A201141 A201142 A201143

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 27 2011

STATUS

approved

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Last modified August 17 15:13 EDT 2017. Contains 290635 sequences.