A184759 Half the number of nX7 binary arrays with no 1 having an adjacent 1 both above and to its left.

64, 4021, 287802, 20148584, 1415755252, 99419347147, 6982256142285, 490358739919898, 34437619490245450, 2418533807739519677, 169852219543126318591, 11928622276532341733243, 837740183488415335215180

Offset: 1

Author

R. H. Hardin Jan 21 2011

Keywords

• nonn

Comments

Column 7 of A184761

Examples

			Some solutions for 3X7
..0..1..0..1..0..1..0....0..0..1..0..0..1..1....0..1..0..1..1..0..0
..0..0..1..0..1..0..0....0..0..0..1..1..0..0....0..1..0..0..1..0..0
..0..1..0..0..1..0..1....1..0..0..0..1..1..0....0..0..0..0..0..1..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..200