A221654 - OEIS

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

(list; graph; refs; listen; history; text; internal format)

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