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A221271
Number of nX3 arrays of occupancy after each element moves to some king-move neighbor, with every occupancy equal to zero or two
0
0, 16, 0, 596, 0, 24366, 0, 1001855, 0, 41171316, 0, 1691327788, 0, 69470653170, 0, 2853337539621, 0, 117191717993760, 0, 4813242705044572, 0, 197686734633818238, 0, 8119268451165592095, 0
OFFSET
1,2
COMMENTS
Column 3 of A221273
EXAMPLE
Some solutions for n=4
..0..2..0....2..2..0....0..2..0....0..0..2....2..0..2....0..2..2....2..0..0
..0..2..0....2..0..0....2..2..0....2..2..2....2..2..0....2..2..0....2..0..2
..2..0..0....2..0..0....0..2..2....0..2..2....2..0..0....0..2..0....2..2..0
..2..2..2....0..2..2....0..2..0....0..0..0....0..2..0....0..2..0....0..0..2
CROSSREFS
Sequence in context: A221726 A221729 A219950 * A198804 A274377 A221380
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 08 2013
STATUS
approved