A219796 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..3 n X n array

4, 4, 71, 1605, 91972, 12642165

Offset

1,1

Comments

Diagonal of A219802

Links

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

Example

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

Crossrefs

Sequence in context: A124399 A119600 A244027 * A222426 A107053 A327303

Adjacent sequences: A219793 A219794 A219795 * A219797 A219798 A219799

Keyword

nonn

Author

R. H. Hardin Nov 28 2012

Status

approved