A183310 Half the number of nX9 binary arrays with no element equal to a strict majority of its horizontal and vertical neighbors.

21, 56, 997, 18064, 445859, 10149621, 234636215, 5406312318, 124597748299, 2872365166632, 66225579904258, 1527174330126193, 35219108887364016, 812230463677554629, 18731997169049673477, 432004778124039265271

Offset: 1

Author

R. H. Hardin Jan 03 2011

Keywords

• nonn

Comments

Column 9 of A183312

Examples

			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
		

Links

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