A221936 Number of nX6 arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, without move-in move-out straight through or left turns.

60, 40608, 17595404, 8118923949, 3719159201319, 1705064784016177, 781631768770230485, 358315975721236723937, 164259260168423743838749, 75299755989611523426077650, 34518925873564465982979613568

Offset: 1

Author

R. H. Hardin Feb 01 2013

Keywords

• nonn

Comments

Column 6 of A221937

Examples

			Some solutions for n=3
..0..2..1..1..2..0....0..2..0..1..0..3....0..2..0..1..0..2....0..2..1..0..3..1
..0..3..2..1..1..2....0..3..0..2..1..0....0..3..1..0..1..1....0..3..2..1..0..0
..0..1..0..0..0..2....0..2..1..0..2..1....0..2..0..3..0..2....0..0..1..0..4..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..31