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A202648 Number of n X n 0..1 arrays with no row or column sum equal to the previous 1
2, 8, 126, 10016, 3648810, 5616280768, 35610018145138 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A202651

LINKS

Table of n, a(n) for n=1..7.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A228064 A271846 A009360 * A193481 A156497 A064205

Adjacent sequences:  A202645 A202646 A202647 * A202649 A202650 A202651

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 22 2011

STATUS

approved

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Last modified August 11 15:10 EDT 2022. Contains 356066 sequences. (Running on oeis4.)