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A183781 Half the number of (n+1)X9 binary arrays with no 2X2 subblock having exactly 2 ones 1
3653, 83799, 1604473, 34228999, 701022093, 14750484447, 307446383061, 6453534773135, 135163113130301, 2836308059464159, 59486265398855701, 1248295058919868871, 26191521416003319909, 549635175272088975695 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 8 of A183782

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

EXAMPLE

Some solutions with a(1,1)=0 for 3X9

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

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

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

CROSSREFS

Sequence in context: A232837 A252086 A212852 * A252678 A307937 A190923

Adjacent sequences:  A183778 A183779 A183780 * A183782 A183783 A183784

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 07 2011

STATUS

approved

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Last modified September 18 13:54 EDT 2021. Contains 347527 sequences. (Running on oeis4.)