A221204 Number of 5Xn arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with no occupancy greater than 2

0, 1681, 976, 20277009, 433687328, 420771471561, 29037336149952, 10986555692499984

Offset

1,2

Comments

Row 5 of A221200

Links

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

Example

Some solutions for n=3
..2..2..0....0..2..0....0..2..1....1..2..1....0..2..1....0..2..0....0..2..0
..1..2..0....1..2..1....1..2..0....1..2..0....0..2..0....2..2..0....2..2..1
..0..2..1....0..2..0....1..2..0....0..2..1....1..2..1....1..2..1....1..2..0
..0..2..0....0..2..1....0..2..0....0..2..1....1..2..0....0..2..1....0..2..0
..0..2..1....2..2..0....1..2..1....0..2..0....0..2..1....0..2..0....1..2..0

Crossrefs

Sequence in context: A172673 A172768 A172667 * A145292 A228183 A175897

Adjacent sequences: A221201 A221202 A221203 * A221205 A221206 A221207

Keyword

nonn

Author

R. H. Hardin Jan 04 2013

Status

approved