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A221789
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Number of 4Xn arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without 2-loops or left turns
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1
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0, 0, 1, 16, 173, 1325, 15936, 187794, 2167196, 25071259, 290320330, 3362811279, 38954814644, 451260930462, 5227519694115, 60556885619049, 701505602257606, 8126407466223744, 94138215587957627, 1090519135777805628
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OFFSET
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1,4
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COMMENTS
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LINKS
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EXAMPLE
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All solutions for n=3
..0..2..1
..1..2..0
..0..2..1
..1..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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