A221601 Number of n X 3 arrays of occupancy after each element moves to some king-move neighbor, without move-in move-out left turns.

2, 140, 4656, 154886, 5151998, 171049120, 5677948938, 188450054011, 6254325771044, 207566300235783, 6888593198993242, 228614249447935042, 7587098694519299516, 251795554672602293612, 8356421637843385136719

Offset

1,1

Comments

Column 3 of A221602.

Links

R. H. Hardin, Table of n, a(n) for n = 1..69

Example

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

Crossrefs

Cf. A221602.

Sequence in context: A140898 A220513 A120814 * A334013 A115890 A356747

Adjacent sequences: A221598 A221599 A221600 * A221602 A221603 A221604

Keyword

nonn

Author

R. H. Hardin, Jan 20 2013

Status

approved