A221747 Number of nX3 arrays of occupancy after each element moves to some king-move neighbor, without move-in move-out straight through or left turns

0, 98, 1050, 32129, 617713, 14217642, 302341148, 6643779685, 143927012415, 3136786802690, 68184190005266, 1483776528178631, 32273118367892713, 702107961743369426, 15273104465846955237, 332252019016169780082

Offset

1,2

Comments

Column 3 of A221749

Links

R. H. Hardin, Table of n, a(n) for n = 1..55

Example

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

Crossrefs

Sequence in context: A088736 A292552 A233373 * A190636 A019563 A285045

Adjacent sequences: A221744 A221745 A221746 * A221748 A221749 A221750

Keyword

nonn

Author

R. H. Hardin Jan 24 2013

Status

approved