A206935 Number of nX7 0..1 arrays avoiding 0 0 0 horizontally and 0 1 1 vertically.

81, 6561, 165783, 3227589, 48992069, 659747611, 8138711727, 95444167901, 1083046694943, 12066441712663, 133097165591799, 1461908430267595, 16040101557258779, 176117037501045883, 1936527748635116761

Offset: 1

Author

R. H. Hardin Feb 13 2012

Keywords

• nonn

Comments

Column 7 of A206936

Examples

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

Links

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