A219453 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 columns, 0..3 n X n array.

4, 4, 114, 3422, 435960, 124508284

Offset

1,1

Comments

Diagonal of A219460.

Links

Table of n, a(n) for n=1..6.

Example

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

Crossrefs

Cf. A219460.

Sequence in context: A009534 A009559 A163196 * A283453 A055071 A213142

Adjacent sequences: A219450 A219451 A219452 * A219454 A219455 A219456

Keyword

nonn

Author

R. H. Hardin, Nov 20 2012

Status

approved