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A219845 Number of n X n arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 n X n array 0
3, 7, 65, 1302, 48677, 4032388, 902318235, 645090935308 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A219852

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=3

..0..0..0....1..0..0....1..0..0....0..0..0....1..0..0....1..0..0....2..1..1

..0..0..2....0..0..0....1..0..1....0..0..0....1..0..1....0..0..0....2..1..2

..2..1..1....0..2..2....1..1..1....2..0..0....1..1..2....0..1..1....2..2..2

CROSSREFS

Sequence in context: A077703 A134705 A110433 * A041817 A120364 A088797

Adjacent sequences:  A219842 A219843 A219844 * A219846 A219847 A219848

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 29 2012

STATUS

approved

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Last modified August 18 04:50 EDT 2019. Contains 326072 sequences. (Running on oeis4.)