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A183303 Half the number of n X n binary arrays with no element equal to a strict majority of its horizontal and vertical neighbors 0
1, 3, 9, 55, 910, 29400, 2160250, 348871589, 124597748299, 98443712937832, 171962948531581497, 664040284641624620852, 5667787901436816984441067 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A183312

LINKS

Table of n, a(n) for n=1..13.

EXAMPLE

Some solutions with a(1,1)=0 for 5X5

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

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

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

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

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

CROSSREFS

Sequence in context: A233189 A175117 A245117 * A075979 A128681 A292333

Adjacent sequences:  A183300 A183301 A183302 * A183304 A183305 A183306

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 03 2011

STATUS

approved

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Last modified July 5 19:02 EDT 2020. Contains 335473 sequences. (Running on oeis4.)