A223955 Number of n X n 0..3 arrays with antidiagonals unimodal and rows and diagonals nondecreasing.

4, 85, 3471, 176893, 9779558, 556027700, 31770135236, 1805384910990, 101606391647751, 5657068092397559, 311737148953336261, 17023765723406625834, 922742812050648219706

Offset: 1

Author

R. H. Hardin Mar 29 2013

Keywords

• nonn

Comments

Diagonal of A223961

Examples

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