A220541 Equals one maps: number of 5Xn binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal, diagonal and antidiagonal neighbors in a random 0..1 5Xn array

1, 424, 1802, 67729, 725639, 17238287, 258266532, 4856316157

Offset

1,2

Comments

Row 5 of A220537

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Sequence in context: A134218 A246733 A202772 * A091292 A184766 A250377

Adjacent sequences: A220538 A220539 A220540 * A220542 A220543 A220544

Keyword

nonn

Author

R. H. Hardin Dec 15 2012

Status

approved