A223755 Number of n X n 0..3 arrays with rows, antidiagonals and columns unimodal.

4, 256, 61733, 26631193, 15947472102, 12025063773557, 10962346407561257, 11777774040586957640

Offset: 1

Author

R. H. Hardin Mar 27 2013

Keywords

• nonn

Comments

Diagonal of A223762

Examples

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