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A202415
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Number of (n+2)X4 binary arrays with no more than one of any consecutive three bits set in any row or column
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1
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94, 356, 1369, 5167, 19569, 74358, 281925, 1068716, 4054318, 15377537, 58314741, 221168653, 838835430, 3181337791, 12065537250, 45760307296, 173551434573, 658213326759, 2496355179281, 9467731905634, 35907499294429, 136183511806220
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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) = a(n-1) +3*a(n-2) +21*a(n-3) +29*a(n-4) +12*a(n-5) -21*a(n-6) -53*a(n-7) -41*a(n-8) +5*a(n-9) +21*a(n-10) +9*a(n-11) +4*a(n-12) +a(n-13)
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EXAMPLE
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Some solutions for n=5
..0..0..1..0....0..1..0..0....0..1..0..0....0..1..0..0....0..0..0..0
..0..1..0..0....0..0..0..0....1..0..0..0....0..0..1..0....0..0..0..0
..0..0..0..0....0..0..0..1....0..0..0..1....0..0..0..1....0..0..1..0
..0..0..1..0....0..0..1..0....0..1..0..0....0..0..0..0....0..0..0..1
..0..0..0..1....0..1..0..0....0..0..1..0....0..0..1..0....0..1..0..0
..0..1..0..0....0..0..0..1....1..0..0..1....1..0..0..0....0..0..0..0
..1..0..0..0....0..0..1..0....0..1..0..0....0..0..0..0....0..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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