A224152 Number of n X n 0..1 arrays with diagonals and rows unimodal and antidiagonals nondecreasing.

2, 12, 89, 574, 3469, 20065, 114537, 650819, 3705824, 21181267, 121617211, 701255335, 4058735341, 23565789117, 137190976378, 800437914689, 4678794395883, 27391873966579, 160581355210547, 942493889605853

Offset: 1

Author

R. H. Hardin, Mar 31 2013

Keywords

• nonn

Comments

Diagonal of A224158.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..23

Crossrefs

Cf. A224158.