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A267637 Number of n X n 0..1 arrays with every repeated value in every row and column unequal to the previous repeated value, and new values introduced in row-major sequential order. 0
1, 8, 51, 1015, 8917, 343145, 3696933, 330654951, 4301737251, 1093232460925 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A267644.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A267644.

Sequence in context: A048438 A295602 A226199 * A238648 A215834 A180319

Adjacent sequences:  A267634 A267635 A267636 * A267638 A267639 A267640

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 18 2016

STATUS

approved

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Last modified October 1 16:22 EDT 2020. Contains 337443 sequences. (Running on oeis4.)