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A221407
Number of nX6 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, with every occupancy equal to zero or two
0
8, 328, 12668, 492102, 18852560, 722442370, 27665242848, 1058237377670
OFFSET
1,1
COMMENTS
Column 6 of A221408
EXAMPLE
Some solutions for n=3
..0..0..2..0..2..2....0..0..2..2..0..2....2..2..0..2..0..2....2..0..0..0..2..0
..2..0..0..2..0..0....2..0..2..0..0..2....2..0..0..2..0..0....2..2..2..2..2..0
..2..0..2..2..0..2....0..2..2..0..0..2....0..2..2..0..2..0....0..0..2..0..0..2
CROSSREFS
Sequence in context: A344094 A264053 A300613 * A204069 A226551 A374307
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 15 2013
STATUS
approved