A219845 Number of n X n arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 n X n array

3, 7, 65, 1302, 48677, 4032388, 902318235, 645090935308

Offset

1,1

Comments

Diagonal of A219852

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

Crossrefs

Sequence in context: A077703 A134705 A110433 * A041817 A365141 A332259

Adjacent sequences: A219842 A219843 A219844 * A219846 A219847 A219848

Keyword

nonn

Author

R. H. Hardin Nov 29 2012

Status

approved