A220582 Equals one maps: number of 4Xn binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and antidiagonal neighbors in a random 0..1 4Xn array.

1, 128, 375, 17505, 165130, 2652007, 33180533, 450926562, 5905274893, 77665021467

Offset: 1

Author

R. H. Hardin Dec 16 2012

Keywords

• nonn

Comments

Row 4 of A220579

Examples

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