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A221724 Number of 3Xn arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor 1
1, 306, 11733, 544757, 24019048, 1068474439, 47427140282, 2106033021852, 93510052180466, 4152013229849883, 184355733843153070, 8185679969358665185, 363456710563714005229, 16138033279951566079150, 716553304870897490539683 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Row 3 of A221723
LINKS
EXAMPLE
Some solutions for n=3
..1..0..0....2..2..0....1..2..2....1..1..0....2..3..0....0..3..1....0..5..0
..0..1..1....0..4..1....0..0..0....1..1..2....0..0..0....0..2..2....0..0..1
..3..3..0....0..0..0....2..1..1....2..1..0....0..4..0....1..0..0....0..1..2
CROSSREFS
Sequence in context: A223073 A064257 A221854 * A023908 A035843 A128477
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2013
STATUS
approved

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Last modified April 24 04:14 EDT 2024. Contains 371918 sequences. (Running on oeis4.)