A223675 Number of n X n 0..1 arrays with rows and antidiagonals unimodal.

2, 16, 316, 9822, 384009, 17068664, 821284360, 41697505423, 2202335611907, 120016210924727, 6715040320826544, 384617913213951506, 22513060559771644440, 1345458233683987073442, 82071805127975022481091

Offset: 1

Author

R. H. Hardin Mar 25 2013

Keywords

• nonn

Comments

Diagonal of A223680

Examples

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