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A221307
Number of nX5 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, with every occupancy equal to zero or two
0
0, 90, 0, 38146, 0, 19642342, 0, 9842336697, 0, 4907450696408, 0, 2441328266555768, 0, 1213489893520857350, 0, 602992641919618581949, 0, 299597420150822374508346, 0, 148848899893861061853934856, 0
OFFSET
1,2
COMMENTS
Column 5 of A221308
EXAMPLE
Some solutions for n=4
..0..0..0..2..2....0..2..0..0..0....0..0..2..0..0....2..2..0..2..0
..2..2..0..0..0....0..2..0..2..0....2..2..2..2..0....0..0..0..2..2
..0..0..2..2..0....2..2..2..2..0....0..0..0..2..2....0..0..0..0..2
..2..2..2..2..0....0..2..0..2..2....0..2..2..0..2....2..2..2..2..0
CROSSREFS
Sequence in context: A087341 A093405 A348166 * A058631 A078293 A247899
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 09 2013
STATUS
approved