A219600 Number of 7Xn 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 7Xn array

28, 247, 4129, 60252, 1093496, 21435360, 415752625

Offset

1,1

Comments

Row 7 of A219595

Links

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

Example

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

Crossrefs

Sequence in context: A112797 A085438 A188526 * A092341 A042522 A025517

Adjacent sequences: A219597 A219598 A219599 * A219601 A219602 A219603

Keyword

nonn

Author

R. H. Hardin Nov 23 2012

Status

approved