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A189899 Number of n X n binary arrays without the pattern 0 0 1 1 diagonally, vertically, antidiagonally or horizontally 0
2, 16, 512, 35656, 6442436, 2719427244, 2662054379066, 6207537762978575 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A189905

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for 4X4

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

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

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

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

CROSSREFS

Sequence in context: A012389 A009710 A012393 * A189335 A189773 A189152

Adjacent sequences:  A189896 A189897 A189898 * A189900 A189901 A189902

KEYWORD

nonn

AUTHOR

R. H. Hardin May 01 2011

STATUS

approved

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Last modified January 21 00:46 EST 2022. Contains 350473 sequences. (Running on oeis4.)