A219809 Number of n X n arrays of the minimum value of corresponding elements and their horizontal, vertical or diagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 n X n array

3, 6, 62, 648, 11395, 510090, 59065976

Offset

1,1

Comments

Diagonal of A219816

Links

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

Example

Some solutions for n=3
..1..0..0....1..0..0....0..0..0....0..0..0....1..0..0....2..1..1....0..0..0
..1..0..0....1..0..0....2..0..0....1..0..0....2..1..0....2..1..1....0..0..0
..2..1..0....2..2..0....2..2..1....2..2..0....2..1..1....2..1..1....0..0..0

Crossrefs

Sequence in context: A103066 A145887 A364852 * A137123 A137133 A137137

Adjacent sequences: A219806 A219807 A219808 * A219810 A219811 A219812

Keyword

nonn

Author

R. H. Hardin Nov 28 2012

Status

approved