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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 January 26 14:08 EST 2020. Contains 331280 sequences. (Running on oeis4.)