A183308 Half the number of nX7 binary arrays with no element equal to a strict majority of its horizontal and vertical neighbors

8, 22, 205, 1798, 19899, 206755, 2160250, 22504107, 234636215, 2447317278, 25539919635, 266563403686, 2782185688787, 29038350922976, 303075629656107, 3163217395827118, 33014647369487612, 344575588242732515

Offset

1,1

Comments

Column 7 of A183312

Links

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

Example

Some solutions with a(1,1)=0 for 7X4
..0..1..0..1....0..1..0..1....0..0..1..0....0..1..0..1....0..1..0..1
..1..0..0..1....1..0..1..0....1..1..0..1....0..1..0..1....0..1..0..1
..1..0..1..0....1..0..1..0....0..1..0..1....1..0..1..0....1..1..0..0
..0..1..0..1....0..1..0..1....1..0..1..0....0..1..1..0....0..0..1..1
..0..1..0..0....1..1..0..1....0..1..0..1....0..1..0..1....1..1..0..0
..1..0..1..1....0..0..1..0....1..1..0..0....1..0..0..1....0..1..0..1
..1..0..1..0....1..0..1..0....0..0..1..1....0..1..1..0....1..0..1..0

Crossrefs

Sequence in context: A026593 A131622 A217275 * A362825 A117613 A215740

Adjacent sequences: A183305 A183306 A183307 * A183309 A183310 A183311

Keyword

nonn

Author

R. H. Hardin Jan 03 2011

Status

approved