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A221336
Number of nX4 arrays of occupancy after each element stays put or moves to some king-move neighbor, with every occupancy equal to zero or two
0
4, 68, 790, 10704, 142792, 1937900, 26264018, 356533300, 4838763426, 65677043240, 891388869206
OFFSET
1,1
COMMENTS
Column 4 of A221337
EXAMPLE
Some solutions for n=3
..2..0..2..0....2..0..0..2....0..2..2..2....2..0..0..0....0..2..0..2
..2..0..0..0....0..0..0..2....2..0..0..0....2..0..2..2....0..2..2..0
..2..2..2..0....2..0..2..2....2..0..2..0....2..2..0..0....2..0..2..0
CROSSREFS
Sequence in context: A272134 A073774 A247735 * A339787 A323276 A141032
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 11 2013
STATUS
approved