A221924 Number of nX4 arrays of occupancy after each element stays put or moves to some king-move neighbor, without move-in move-out straight through or left turns

13, 3487, 508281, 75313013, 11143187999, 1648683705320, 243924224883451, 36085841660921104, 5338383610734905950, 789733272292081157838

Offset

1,1

Comments

Column 4 of A221925

Links

Table of n, a(n) for n=1..10.

Example

Some solutions for n=3
..0..0..0..1....0..2..1..3....0..4..0..3....0..1..2..0....0..3..0..1
..0..5..0..0....0..0..0..1....0..1..0..0....0..2..0..1....0..2..1..1
..1..3..0..2....2..1..1..1....0..3..1..0....1..0..3..2....3..0..1..0

Crossrefs

Sequence in context: A221885 A134159 A221851 * A292109 A337147 A070905

Adjacent sequences: A221921 A221922 A221923 * A221925 A221926 A221927

Keyword

nonn

Author

R. H. Hardin Jan 31 2013

Status

approved