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A283277
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Number of nX3 0..1 arrays with no 1 equal to more than two of its horizontal, vertical and antidiagonal neighbors.
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1
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8, 50, 287, 1725, 10299, 61491, 367208, 2192810, 13094522, 78194882, 466946550, 2788405644, 16651169555, 99433684945, 593775569480, 3545774525272, 21173853607285, 126441225573015, 755053086743011, 4508855092288477
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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) = 5*a(n-1) +5*a(n-2) +6*a(n-3) -7*a(n-4) -a(n-5) -4*a(n-6) +11*a(n-7) -12*a(n-8) +7*a(n-9) -9*a(n-10) +6*a(n-11) -2*a(n-12)
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EXAMPLE
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Some solutions for n=4
..1..1..0. .1..0..1. .0..0..1. .0..0..0. .0..0..0. .0..0..0. .0..1..1
..0..0..0. .1..0..0. .0..0..0. .1..1..1. .0..0..0. .0..0..1. .1..0..1
..0..0..0. .1..0..0. .1..0..0. .0..0..1. .0..1..1. .0..1..0. .0..0..1
..0..1..0. .1..1..0. .0..1..0. .0..1..0. .0..0..0. .0..1..0. .1..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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