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A208005
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Number of nX6 0..1 arrays avoiding 0 0 1 and 1 0 0 horizontally and 0 1 1 and 1 1 0 vertically
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1
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22, 484, 1690, 4993, 24512, 90232, 486443, 2001968, 10846870, 47911153, 256232284, 1188682252, 6276190547, 30137070988, 157660283714, 775400765057, 4032502502920, 20159263106416, 104466312892411, 528009028013752
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OFFSET
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1,1
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COMMENTS
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LINKS
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FORMULA
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Empirical: a(n) = 9*a(n-1) -2*a(n-2) -170*a(n-3) +392*a(n-4) +322*a(n-5) -1512*a(n-6) +474*a(n-7) +1498*a(n-8) -942*a(n-9) -376*a(n-10) +326*a(n-11) +a(n-12) -19*a(n-13) for n>14
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EXAMPLE
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Some solutions for n=4
..0..1..0..1..1..1....0..1..0..1..0..1....1..1..1..1..1..0....0..0..0..0..0..0
..0..0..0..0..0..0....0..1..1..0..1..1....1..0..1..1..0..1....1..0..1..0..1..0
..1..0..1..0..1..0....1..1..0..1..0..1....1..1..1..1..1..0....0..1..0..1..0..1
..0..1..0..1..0..1....0..1..1..0..1..1....1..0..1..1..0..1....1..0..1..0..1..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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