A219620 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 columns, 0..2 n X n array.

3, 11, 130, 5072, 556742, 172829660, 149566037863, 395003219927359

Offset

1,1

Comments

Diagonal of A219627.

Links

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

Example

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

Crossrefs

Cf. A219627.

Sequence in context: A113848 A287429 A274664 * A201611 A088075 A088076

Adjacent sequences: A219617 A219618 A219619 * A219621 A219622 A219623

Keyword

nonn

Author

R. H. Hardin, Nov 24 2012

Status

approved