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A189152 Number of n X n binary arrays without the pattern 0 0 1 1 diagonally, vertically or horizontally 0
2, 16, 512, 37976, 8210464, 4708773306, 6787471566616, 25828698626846656, 247502169348575094540, 6064620415913633106142608 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A189161

LINKS

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

EXAMPLE

Some solutions for 4X4

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

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

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

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

CROSSREFS

Sequence in context: A189899 A189335 A189773 * A265015 A267728 A063387

Adjacent sequences:  A189149 A189150 A189151 * A189153 A189154 A189155

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 17 2011

STATUS

approved

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Last modified November 30 08:19 EST 2021. Contains 349419 sequences. (Running on oeis4.)