A267728 - OEIS

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

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Diagonal of A267735.

LINKS

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

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 20 2016

STATUS

approved