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A188740 Number of n X n binary arrays without the pattern 1 1 1 diagonally, vertically or antidiagonally 0
2, 16, 292, 17286, 3283906, 1536573216, 2307086087740, 10143499802360135, 123466985032906186049, 4528058434298770108386326, 481947777827695507476795332215, 147455854241909275954639647341005231 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A188747

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for 3X3

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

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

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

CROSSREFS

Sequence in context: A223664 A189611 A189689 * A259647 A188985 A009250

Adjacent sequences:  A188737 A188738 A188739 * A188741 A188742 A188743

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 09 2011

STATUS

approved

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Last modified December 6 08:53 EST 2016. Contains 278775 sequences.