A206999 Number of nX7 0..1 arrays avoiding 0 1 0 horizontally and 0 1 1 vertically.

65, 4225, 105936, 2346621, 41429335, 683241763, 10432265840, 154004233160, 2204564726744, 31044446020755, 431344655622502, 5945601513772082, 81452204001027552, 1111514446777014206, 15124130993994618127

Offset: 1

Author

R. H. Hardin Feb 14 2012

Keywords

• nonn

Comments

Column 7 of A207000

Examples

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

Links

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