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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. 0
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

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

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Last modified December 4 06:41 EST 2021. Contains 349476 sequences. (Running on oeis4.)