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

1,1

Comments

Diagonal of A267735.

Links

Table of n, a(n) for n=1..9.

Example

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.

Sequence in context: A189773 A189152 A265015 * A063387 A326251 A228979

Adjacent sequences: A267725 A267726 A267727 * A267729 A267730 A267731

Keyword

nonn

Author

R. H. Hardin, Jan 20 2016

Status

approved