A207745 Number of 7Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 0 0 vertically.

35, 1225, 20265, 335241, 6349893, 120275089, 2215586241, 40813292529, 758253127923, 14087268396601, 260910039667519, 4832310060602761, 89611728280729061, 1661785304492145361, 30800180353416930867

Offset: 1

Author

R. H. Hardin Feb 19 2012

Keywords

• nonn

Comments

Row 7 of A207741

Examples

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

Links

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