A224140 Number of n X n 0..1 arrays with rows and antidiagonals unimodal and columns nondecreasing.

2, 9, 49, 272, 1509, 8375, 46586, 259927, 1454873, 8167578, 45975525, 259412481, 1466771294, 8308711329, 47142516717, 267868554552, 1524033271457, 8681096155047, 49500982033342, 282533898125471, 1614019099745197

Offset: 1

Author

R. H. Hardin Mar 31 2013

Keywords

• nonn

Comments

Diagonal of A224146

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..22