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A220038 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..3 n X n array 0
4, 13, 184, 8337, 904715, 310371126 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A220044

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A198159 A322659 A042537 * A132512 A203221 A284700

Adjacent sequences:  A220035 A220036 A220037 * A220039 A220040 A220041

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 03 2012

STATUS

approved

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Last modified January 23 17:33 EST 2022. Contains 350514 sequences. (Running on oeis4.)