A219909 Number of n X n arrays of the minimum value of corresponding elements and their horizontal, vertical, diagonal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 n X n array

3, 3, 24, 234, 3800, 105936, 6705546, 1037180598

Offset

1,1

Comments

Diagonal of A219915

Links

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

Example

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

Crossrefs

Sequence in context: A201133 A036114 A369230 * A092864 A183894 A151438

Adjacent sequences: A219906 A219907 A219908 * A219910 A219911 A219912

Keyword

nonn

Author

R. H. Hardin Dec 01 2012

Status

approved