A223783 Number of n X n 0..2 arrays with rows, diagonals and antidiagonals unimodal.

3, 81, 8635, 1560013, 343454446, 82093381460, 20229461153969, 5020313112266183

Offset: 1

Author

R. H. Hardin Mar 27 2013

Keywords

• nonn

Comments

Diagonal of A223789

Examples

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