A207660 Number of nX7 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 1 0 0 vertically.

42, 1764, 8928, 47320, 284272, 1806676, 12327618, 87753008, 651328292, 4960764186, 38639433738, 305186378918, 2437962689512, 19615699465126, 158722646817678, 1289041298468286, 10498617133779346, 85668476633718976

Offset: 1

Author

R. H. Hardin Feb 19 2012

Keywords

• nonn

Comments

Column 7 of A207661

Examples

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

Links

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