A221806 Number of nX3 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, without move-in move-out straight through or left turns

0, 34, 154, 3426, 30716, 437374, 4798574, 60643243, 708210084, 8638426210, 102851006026, 1241050341705, 14864487744061, 178769429361071, 2145106707834543, 25772189455414412, 309421866097564512

Offset

1,2

Comments

Column 3 of A221809

Links

R. H. Hardin, Table of n, a(n) for n = 1..122

Example

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

Crossrefs

Sequence in context: A192398 A167241 A028470 * A321533 A345157 A345126

Adjacent sequences: A221803 A221804 A221805 * A221807 A221808 A221809

Keyword

nonn

Author

R. H. Hardin Jan 26 2013

Status

approved