A220334 Equals two maps: number of 7Xn binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..1 7Xn array.

1, 1081, 84196, 10004541, 1026529800, 119808040854

Offset: 1

Author

R. H. Hardin Dec 10 2012

Keywords

• nonn

Comments

Row 7 of A220328

Examples

			Some solutions for n=3
..0..1..0....0..1..0....0..0..0....0..1..0....0..0..1....0..1..1....0..1..1
..0..1..0....1..1..0....0..0..0....0..1..0....1..0..0....0..1..0....0..0..1
..1..0..0....1..0..0....1..1..1....1..0..0....0..0..0....1..1..0....1..0..0
..0..1..1....0..1..0....0..0..0....0..1..1....0..0..0....0..1..0....1..0..0
..1..0..0....0..0..0....0..0..0....1..0..0....0..1..1....1..1..0....0..1..0
..1..0..0....0..0..1....0..0..0....0..0..0....1..0..1....0..1..0....0..0..0
..0..1..0....0..1..0....0..1..0....1..0..0....1..1..0....1..0..0....1..0..0