A207894 Number of nX7 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 0 and 1 1 1 vertically.

28, 784, 2520, 20168, 135714, 856480, 5888458, 39828558, 260749390, 1761010222, 11829617422, 78462173820, 526979351782, 3530615876490, 23530243300772, 157698231146356, 1055466664497864, 7048335728590736, 47191056299318688

Offset: 1

Author

R. H. Hardin Feb 21 2012

Keywords

• nonn

Comments

Column 7 of A207895

Examples

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

Links

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