A224275 Number of n X n 0..3 arrays with diagonals and rows unimodal and antidiagonals nondecreasing.

4, 160, 13683, 1334973, 137489538, 14587480744, 1597855917875, 182011677068828, 21714188491890254, 2721720866571310952, 357937736330145145387

Offset: 1

Author

R. H. Hardin Apr 02 2013

Keywords

• nonn

Comments

Diagonal of A224281

Examples

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