A267728 Number of n X n 0..1 arrays with every repeated value in every row and column greater than or equal to the previous repeated value.

2, 16, 512, 39330, 9116396, 4977655636, 6910434801148, 22619851307136958, 176312563812861434000

Offset: 1

Author

R. H. Hardin, Jan 20 2016

Keywords

• nonn

Comments

Diagonal of A267735.

Examples

			Some solutions for n=4
..1..0..1..0....1..1..0..1....1..0..0..1....0..0..0..0....0..1..1..0
..0..1..0..0....0..1..1..1....0..0..1..0....0..0..0..0....0..1..1..1
..0..0..1..1....1..1..1..1....0..0..1..0....0..0..1..1....1..1..1..0
..0..0..0..0....0..1..0..0....1..1..1..1....1..0..1..0....1..0..1..0
		

Crossrefs

Cf. A267735.