A220332 Equals two maps: number of 5Xn binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..1 5Xn array

1, 114, 2788, 76627, 2065264, 59893608, 1653121774

Offset

1,2

Comments

Row 5 of A220328

Links

Table of n, a(n) for n=1..7.

Example

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

Crossrefs

Sequence in context: A230464 A200891 A240386 * A162675 A221293 A306194

Adjacent sequences: A220329 A220330 A220331 * A220333 A220334 A220335

Keyword

nonn

Author

R. H. Hardin Dec 10 2012

Status

approved