A219588 Number of n X n arrays of the minimum value of corresponding elements and their horizontal or vertical neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 n X n array

3, 7, 84, 1114, 26006, 1767430, 415752625

Offset

1,1

Comments

Diagonal of A219595

Links

Table of n, a(n) for n=1..7.

Example

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

Crossrefs

Sequence in context: A343763 A045974 A001531 * A219375 A326427 A064118

Adjacent sequences: A219585 A219586 A219587 * A219589 A219590 A219591

Keyword

nonn

Author

R. H. Hardin Nov 23 2012

Status

approved