A223858 Number of n X n 0..3 arrays with rows and antidiagonals unimodal and columns nondecreasing.

4, 100, 4884, 315124, 23738426, 1989679315, 181330154458, 17720685250743, 1838270364212150, 200766237618388230, 22925992371163981667, 2721355255765297425689

Offset: 1

Author

R. H. Hardin Mar 28 2013

Keywords

• nonn

Comments

Diagonal of A223864

Examples

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