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

Author

R. H. Hardin Jan 04 2013

Keywords

• nonn

Comments

Row 5 of A221200

Examples

			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