A219497 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..1 n X n array

2, 3, 11, 35, 107, 325, 995, 3083, 9663, 30581, 97541

Offset

1,1

Comments

Diagonal of A219502

Links

Table of n, a(n) for n=1..11.

Example

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

Crossrefs

Sequence in context: A159458 A305846 A057838 * A348126 A006497 A038912

Adjacent sequences: A219494 A219495 A219496 * A219498 A219499 A219500

Keyword

nonn

Author

R. H. Hardin Nov 20 2012

Status

approved