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A183310
Half the number of nX9 binary arrays with no element equal to a strict majority of its horizontal and vertical neighbors
1
21, 56, 997, 18064, 445859, 10149621, 234636215, 5406312318, 124597748299, 2872365166632, 66225579904258, 1527174330126193, 35219108887364016, 812230463677554629, 18731997169049673477, 432004778124039265271
OFFSET
1,1
COMMENTS
Column 9 of A183312
LINKS
EXAMPLE
Some solutions with a(1,1)=0 for 9X4
..0..1..0..1....0..0..1..0....0..0..1..0....0..1..0..1....0..1..0..1
..1..1..0..1....1..1..0..1....1..1..0..1....1..1..0..1....1..1..0..0
..0..0..1..0....0..0..1..0....0..1..0..1....0..0..1..0....0..0..1..1
..1..1..1..0....1..0..0..1....1..0..1..0....1..1..0..1....1..1..0..0
..0..0..0..1....0..1..1..0....1..0..0..1....0..0..1..0....0..1..0..1
..1..1..1..0....1..0..1..0....0..1..1..0....1..1..1..0....0..1..1..0
..0..0..0..1....0..1..0..1....1..0..0..1....0..0..0..1....1..0..1..1
..1..1..0..1....1..1..0..0....0..0..1..0....1..1..1..0....0..1..0..0
..0..0..1..0....0..0..1..1....1..1..0..1....0..0..1..0....1..0..1..1
CROSSREFS
Sequence in context: A165237 A271734 A189004 * A280884 A257103 A146560
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 03 2011
STATUS
approved