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A264999
Number of n X n arrays containing n copies of 0..n-1 with rows and columns nondecreasing.
0
1, 2, 7, 112, 4919, 1268728, 1001060834, 4031708477982
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A265005.
LINKS
Table of n, a(n) for n=1..8.
EXAMPLE
Some solutions for n=4
..0..0..0..1....0..0..1..3....0..0..1..3....0..0..0..1....0..0..0..2
..0..1..2..2....0..1..1..3....0..1..1..3....0..1..1..1....0..1..1..3
..1..1..3..3....0..1..2..3....0..2..2..3....2..2..2..2....1..1..2..3
..2..2..3..3....2..2..2..3....1..2..2..3....3..3..3..3....2..2..3..3
CROSSREFS
Cf. A265005.
Sequence in context: A045310 A224445 A000157 * A326940 A326964 A034902
Adjacent sequences: A264996 A264997 A264998 * A265000 A265001 A265002
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 29 2015
STATUS
approved

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Last modified November 15 01:26 EST 2024. Contains 377736 sequences.
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