A221260 Number of 6Xn arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, with no occupancy greater than 2.

0, 1024, 1560, 44903401, 4684821704, 4919350997521, 1286684357154700, 711683286892712289, 249788326721013262468, 113635514869793774013025, 44202928096066452637659216

Offset: 1

Author

R. H. Hardin Jan 06 2013

Keywords

• nonn

Comments

Row 6 of A221255

Examples

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