A207087 Number of nX7 0..1 arrays avoiding 0 0 0 horizontally and 0 0 1 vertically.

81, 6561, 248525, 8244759, 243794389, 6897033117, 189659424011, 5142718466575, 138294979168509, 3702335938084439, 98860585328779343, 2635998227067669263, 70227731343750962247, 1870120121498081593459, 49786813201495602614131

Offset: 1

Author

R. H. Hardin Feb 15 2012

Keywords

• nonn

Comments

Column 7 of A207088

Examples

			Some solutions for n=4
..1..0..1..0..1..0..1....1..1..0..0..1..1..1....0..0..1..0..1..1..1
..0..0..1..0..0..1..0....1..1..1..1..1..0..1....1..1..1..1..0..0..1
..0..0..1..0..1..0..1....0..0..1..1..0..1..1....0..1..1..0..1..0..0
..0..0..1..0..0..1..0....0..0..1..0..0..1..1....1..0..1..1..1..0..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210