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A219877 Number of n X n arrays of the minimum value of corresponding elements and their horizontal, diagonal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 n X n array 0
3, 7, 47, 621, 14536, 764027, 113313853 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A219883

LINKS

Table of n, a(n) for n=1..7.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A005650 A020754 A052381 * A031440 A001566 A173771

Adjacent sequences:  A219874 A219875 A219876 * A219878 A219879 A219880

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 30 2012

STATUS

approved

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Last modified November 21 01:33 EST 2019. Contains 329349 sequences. (Running on oeis4.)