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A221268
Number of nX4 arrays of occupancy after each element stays put or moves to some king-move neighbor, with no occupancy greater than 2
0
17, 1073, 71977, 5007745, 355645325, 25512853201, 1838393941445, 132717282488753, 9588278602742109, 692914031177971849
OFFSET
1,1
COMMENTS
Column 4 of A221269
EXAMPLE
Some solutions for n=3
..2..0..2..0....0..2..1..0....0..2..2..0....0..0..0..1....2..1..1..0
..0..2..1..0....0..2..1..2....0..0..2..0....1..2..2..2....1..1..1..0
..2..2..1..0....2..0..0..2....0..2..2..2....2..1..0..1....2..0..2..1
CROSSREFS
Sequence in context: A221376 A077645 A046731 * A179157 A130449 A130035
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 08 2013
STATUS
approved