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A221784
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Number of n X 5 arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without 2-loops or left turns.
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0
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0, 8, 24, 173, 744, 4131, 19998, 104035, 520922, 2661269, 13452654, 68382023, 346582048, 1759291193, 8923150696, 45277608445
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OFFSET
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1,2
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for n=3
..0..1..1..1..1....0..2..2..1..1....0..2..2..2..1....0..2..2..1..1
..0..2..2..2..0....0..1..0..1..0....0..1..2..1..0....0..2..0..1..0
..0..1..2..2..0....1..2..2..2..0....0..1..1..2..0....1..1..2..2..0
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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