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A222017
Number of nX4 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, without move-in move-out straight through or left turns
2
13, 1363, 86088, 5925053, 403317044, 27460842224, 1870475750419, 127385479747138, 8675741759311142, 590866503322144180, 40241368935424750183, 2740665723881270704902, 186654894043998446085330
OFFSET
1,1
COMMENTS
Column 4 of A222020
LINKS
EXAMPLE
Some solutions for n=3
..1..0..1..1....0..3..1..2....1..0..0..1....0..1..2..0....2..2..2..2
..0..3..1..2....0..0..0..0....1..4..0..3....2..1..2..0....0..0..0..0
..1..1..0..1....2..1..3..0....0..1..1..0....2..0..2..0....1..1..0..2
CROSSREFS
Sequence in context: A300592 A221690 A197630 * A238562 A196966 A203369
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 05 2013
STATUS
approved