A221654 Number of nX4 arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, without move-in move-out left turns

4, 165, 5879, 233781, 9205038, 361920243, 14231277957, 559508202559, 21998529416773, 864916824326146, 34006078606756565, 1337021958499590092, 52567889662651586240, 2066819505041258667820, 81261447625183841077280

Offset

1,1

Comments

Column 4 of A221655

Links

R. H. Hardin, Table of n, a(n) for n = 1..26

Example

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

Crossrefs

Sequence in context: A211157 A185857 A347719 * A159011 A358144 A077257

Adjacent sequences: A221651 A221652 A221653 * A221655 A221656 A221657

Keyword

nonn

Author

R. H. Hardin Jan 21 2013

Status

approved