A219821 Number of 7Xn arrays of the minimum value of corresponding elements and their horizontal, vertical or diagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 7Xn array

28, 176, 2359, 27340, 358480, 4734774, 59065976, 707079160

Offset

1,1

Comments

Row 7 of A219816

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Sequence in context: A129136 A042528 A345215 * A341160 A219386 A219632

Adjacent sequences: A219818 A219819 A219820 * A219822 A219823 A219824

Keyword

nonn

Author

R. H. Hardin Nov 28 2012

Status

approved