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A267660 Number of n X n 0..1 arrays with every repeated value in every row unequal to the previous repeated value, and in every column equal to the previous repeated value, and new values introduced in row-major sequential order. 0
1, 8, 108, 3143, 80404, 5663798, 264709135, 46354321490, 3947286385526, 1938755845909663 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A267667.

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=5

..0..0..1..0..1....0..0..1..0..1....0..1..0..1..1....0..0..1..1..0

..0..1..0..0..1....1..0..1..0..1....1..1..0..0..1....1..1..0..0..1

..0..1..0..1..1....0..0..1..0..1....0..0..1..0..1....1..0..1..1..0

..1..0..1..0..0....1..0..1..0..1....0..1..0..0..1....1..0..1..0..1

..0..1..0..1..1....1..0..0..1..1....0..1..0..1..1....0..1..0..0..1

CROSSREFS

Cf. A267667.

Sequence in context: A099699 A084915 A138456 * A273057 A095917 A259233

Adjacent sequences:  A267657 A267658 A267659 * A267661 A267662 A267663

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 19 2016

STATUS

approved

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Last modified January 19 06:18 EST 2022. Contains 350464 sequences. (Running on oeis4.)