A220159 Number of 7Xn arrays of the minimum value of corresponding elements and their horizontal or diagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 7Xn array

36, 266, 5493, 108169, 2173203, 42648602, 822242009, 15270635323

Offset

1,1

Comments

Row 7 of A220153

Links

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

Example

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

Crossrefs

Sequence in context: A133072 A115223 A135181 * A202958 A187511 A185243

Adjacent sequences: A220156 A220157 A220158 * A220160 A220161 A220162

Keyword

nonn

Author

R. H. Hardin Dec 06 2012

Status

approved