A208500 Number of nX7 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 0 and 1 1 1 vertically.

42, 1764, 1728, 5436, 13806, 37430, 111328, 286754, 844200, 2336928, 6407688, 18684540, 50681028, 145645192, 408090270, 1135228896, 3261392100, 8999952300, 25648313760, 72191962584, 201563085152, 574718422958, 1602200548928

Offset: 1

Author

R. H. Hardin Feb 27 2012

Keywords

• nonn

Comments

Column 7 of A208501

Examples

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

Links

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