A223717 Number of n X n 0..2 arrays with rows, antidiagonals and columns unimodal.

3, 81, 5883, 608855, 74140718, 9991366555, 1461411174370, 229731305080429, 38440119395606004

Offset: 1

Author

R. H. Hardin Mar 26 2013

Keywords

• nonn

Comments

Diagonal of A223725

Examples

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