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Search: id:A032167
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| A032167 |
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Number of aperiodic necklaces of n beads of 12 colors. |
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+0
2
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| 12, 66, 572, 5148, 49764, 497354, 5118828, 53745120, 573308736, 6191711526, 67546215516, 743008120140, 8230246567620, 91708459194066, 1027134771622388, 11555266154065920, 130506535690613940
(list; graph; listen)
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OFFSET
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1,1
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LINKS
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C. G. Bower, Transforms (2)
Y. Puri and T. Ward, Arithmetic and growth of periodic orbits, J. Integer Seqs., Vol. 4 (2001), #01.2.1.
F. Ruskey, Necklaces, Lyndon words, De Bruijn sequences, etc.
Index entries for sequences related to Lyndon words
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FORMULA
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"CHK" (necklace, identity, unlabeled) transform of 12, 0, 0, 0...
Sum mu(d)*12^(n/d)/n; d|n.
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CROSSREFS
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Sequence in context: A003200 A036399 A165107 this_sequence A039925 A091074 A117088
Adjacent sequences: A032164 A032165 A032166 this_sequence A032168 A032169 A032170
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KEYWORD
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nonn
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AUTHOR
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Christian G. Bower (bowerc(AT)usa.net)
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