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A219920 Number of 7Xn arrays of the minimum value of corresponding elements and their horizontal, diagonal, diagonal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 7Xn array 0
28, 57, 789, 7877, 76385, 715430, 6705546, 63193592 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 7 of A219915

LINKS

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

EXAMPLE

Some solutions for n=3

..0..0..0....0..0..0....0..0..0....1..1..1....1..1..1....1..1..1....1..1..1

..0..0..0....0..0..0....0..0..0....1..1..1....1..1..1....0..0..0....0..0..0

..0..0..0....0..0..0....1..0..0....1..1..1....1..0..0....0..0..0....0..0..0

..0..0..0....1..0..0....1..0..0....0..0..0....1..0..0....0..0..0....0..0..0

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

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

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

CROSSREFS

Sequence in context: A042560 A042562 A042564 * A219216 A042566 A132769

Adjacent sequences:  A219917 A219918 A219919 * A219921 A219922 A219923

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 01 2012

STATUS

approved

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Last modified May 30 15:38 EDT 2020. Contains 334726 sequences. (Running on oeis4.)