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A219571 Number of n X n arrays of the minimum value of corresponding elements and their horizontal or vertical neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 n X n array 0
4, 13, 415, 18564, 2399643, 1391739384 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A219578

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A219707 A219822 A048558 * A304545 A316372 A306130

Adjacent sequences:  A219568 A219569 A219570 * A219572 A219573 A219574

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 23 2012

STATUS

approved

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Last modified June 28 12:59 EDT 2022. Contains 354907 sequences. (Running on oeis4.)