A219166 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 columns, 0..2 n X n array

3, 7, 146, 5853, 602498, 165134835, 144424701184

Offset

1,1

Comments

Diagonal of A219173

Links

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

Example

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

Crossrefs

Sequence in context: A156521 A012636 A006031 * A119958 A275195 A031881

Adjacent sequences: A219163 A219164 A219165 * A219167 A219168 A219169

Keyword

nonn

Author

R. H. Hardin Nov 13 2012

Status

approved