A207784 Number of nX7 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 0 and 1 0 1 vertically.

25, 625, 2815, 12567, 46199, 185613, 786907, 3121285, 12547290, 51431686, 207462822, 837211531, 3399092159, 13752531706, 55605190507, 225211225477, 911554639912, 3688266309172, 14929725196351, 60428546476595

Offset: 1

Author

R. H. Hardin Feb 20 2012

Keywords

• nonn

Comments

Column 7 of A207785

Examples

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

Links

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