A221549 Number of nX3 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, without move-in move-out left turns

2, 72, 1930, 47976, 1196232, 29856238, 745144793, 18597229593, 464150326595, 11584303335876, 289122180321148, 7215940813826595, 180096192359343564, 4494859317429619337, 112183162016821282782, 2799878918782194289254

Offset

1,1

Comments

Column 3 of A221551

Links

R. H. Hardin, Table of n, a(n) for n = 1..150

Example

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

Crossrefs

Sequence in context: A070775 A157061 A179957 * A289197 A174582 A377881

Adjacent sequences: A221546 A221547 A221548 * A221550 A221551 A221552

Keyword

nonn

Author

R. H. Hardin Jan 19 2013

Status

approved