A220028 Number of n X n 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..1 n X n array.

2, 4, 10, 34, 111, 358, 1165, 3789, 12375, 40583, 133632, 441773

Offset: 1

Author

R. H. Hardin Dec 03 2012

Keywords

• nonn

Comments

Diagonal of A220032

Examples

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