A221832 Number of 5 X n arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, without 2-loops or left turns.

0, 292, 41618, 4755445, 570066685, 68573607669, 8233561918895, 988927665068644, 118765199887208210

Offset

1,2

Comments

Row 5 of A221828.

Links

Table of n, a(n) for n=1..9.

Example

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

Crossrefs

Cf. A221828.

Sequence in context: A249239 A221359 A248454 * A238321 A231662 A098249

Adjacent sequences: A221829 A221830 A221831 * A221833 A221834 A221835

Keyword

nonn

Author

R. H. Hardin, Jan 26 2013

Status

approved