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A221851
Number of nX4 arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, without consecutive moves in the same direction
0
13, 3437, 465305, 67228149, 9607602488, 1374453486067, 196583533871825, 28117377558933453
OFFSET
1,1
COMMENTS
Column 4 of A221852
EXAMPLE
Some solutions for n=3
..0..2..1..0....0..2..0..0....0..1..1..0....0..3..0..2....0..4..0..2
..0..0..3..0....0..1..7..0....1..0..1..4....0..1..0..2....0..0..1..0
..1..3..2..0....1..0..1..0....0..3..0..1....0..1..1..2....0..3..1..1
CROSSREFS
Sequence in context: A159357 A221885 A134159 * A221924 A292109 A337147
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 27 2013
STATUS
approved