A222019 Number of nX6 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, without move-in move-out straight through or left turns.

60, 70994, 41636522, 27460842224, 17838051289367, 11593944359617570, 7538777970648890706, 4901063986390211477492, 3186408336556340539334545

Offset: 1

Author

R. H. Hardin Feb 05 2013

Keywords

• nonn

Comments

Column 6 of A222020

Examples

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