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A183348
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Number of nX6 binary arrays with each 1 adjacent to exactly one 0 vertically and one 0 horizontally
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1
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1, 59, 144, 387, 1738, 6388, 21613, 80265, 293909, 1054102, 3826357, 13908756, 50348578, 182488789, 661927393, 2399290143, 8697153598, 31532425599, 114313031784, 414403709932, 1502343342329, 5446419432557, 19744616103905
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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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FORMULA
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Empirical: a(n)=a(n-1)+3*a(n-2)+22*a(n-3)+20*a(n-4)-19*a(n-5)-93*a(n-6)-123*a(n-7)+61*a(n-8)+266*a(n-9)+98*a(n-10)-170*a(n-11)-107*a(n-12)+6*a(n-13)+6*a(n-14)+2*a(n-15)+17*a(n-16)-4*a(n-17)+10*a(n-18)+a(n-20)
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EXAMPLE
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Some solutions for 5X6
..1..0..0..0..0..1....1..0..0..0..0..0....1..0..0..0..0..0....0..0..0..0..0..0
..0..1..1..0..0..0....0..0..0..0..0..0....0..0..1..1..0..1....0..0..1..1..0..0
..0..1..1..0..0..0....0..0..1..1..0..1....0..0..1..1..0..1....0..0..1..1..0..0
..0..0..0..0..0..0....0..0..1..1..0..1....0..0..0..0..0..0....0..0..0..0..0..0
..0..0..1..1..0..1....1..0..0..0..0..0....0..0..0..0..0..0....0..1..1..0..0..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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