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A141148
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Number of aperiodic ternary necklaces with n beads of each color and no adjacent beads of the same color.
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2
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2, 3, 14, 65, 346, 1929, 11442, 70310, 445928, 2896239, 19186738, 129184583, 881808726, 6089840427, 42482905678, 298976072384, 2120377458898, 15141288786096, 108784152585234, 785869928763325, 5705406374237814
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OFFSET
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1,1
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LINKS
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FORMULA
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a(n) = Sum_{d|n} moebius(n/d) * A141147(d) / n.
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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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