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A202581 T(n,k)=Number of nXk 0..3 arrays with the row and column sums nondecreasing 7
4, 10, 10, 20, 90, 20, 35, 616, 616, 35, 56, 3731, 15688, 3731, 56, 84, 20208, 343827, 343827, 20208, 84, 120, 102665, 6776376, 27871870, 6776376, 102665, 120, 165, 492118, 123282439, 2028764764, 2028764764, 123282439, 492118, 165, 220, 2275947 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Table starts
...4.......10..........20............35..............56..............84
..10.......90.........616..........3731...........20208..........102665
..20......616.......15688........343827.........6776376.......123282439
..35.....3731......343827......27871870......2028764764....136314892664
..56....20208.....6776376....2028764764....550113111784.137822089847470
..84...102665...123282439..136314892664.137822089847470
.120...492118..2108296388.8588877039627
.165..2275947.34358272840
.220.10175908
.286
LINKS
EXAMPLE
Some solutions for n=3 k=3
..0..0..0....0..1..1....1..2..3....1..1..2....1..2..2....0..0..1....0..1..3
..2..2..2....3..2..1....1..3..2....1..2..3....0..2..3....0..1..3....0..3..2
..3..3..3....1..2..3....3..2..2....2..2..2....3..1..3....1..2..2....3..2..1
CROSSREFS
Column 1 is A000292(n+1)
Sequence in context: A227060 A278727 A184129 * A201729 A310337 A201836
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Dec 21 2011
STATUS
approved

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Last modified July 18 15:13 EDT 2024. Contains 374388 sequences. (Running on oeis4.)