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A220003 Number of n X n arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 n X n array 0
4, 7, 109, 4474, 381745, 83856137 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A220010

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

Some solutions for n=3

..1..0..0....2..1..1....2..2..2....3..1..1....1..0..0....2..2..2....2..2..1

..0..0..0....1..1..1....2..2..0....3..1..1....1..0..0....2..2..2....2..1..1

..0..0..0....1..1..3....2..0..0....3..3..3....2..0..0....3..3..3....2..1..1

CROSSREFS

Sequence in context: A136276 A072954 A322723 * A024054 A289381 A126577

Adjacent sequences:  A220000 A220001 A220002 * A220004 A220005 A220006

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 03 2012

STATUS

approved

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Last modified July 1 04:13 EDT 2022. Contains 354951 sequences. (Running on oeis4.)