A221293 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..3 5Xn array

1, 114, 3332, 123958, 4983598, 172905144, 6138441061

Offset

1,2

Comments

Row 5 of A221290

Links

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

Example

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

Crossrefs

Sequence in context: A240386 A220332 A162675 * A306194 A112485 A220685

Adjacent sequences: A221290 A221291 A221292 * A221294 A221295 A221296

Keyword

nonn

Author

R. H. Hardin Jan 09 2013

Status

approved