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A032167
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Number of aperiodic necklaces of n beads of 12 colors.
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1
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12, 66, 572, 5148, 49764, 497354, 5118828, 53745120, 573308736, 6191711526, 67546215516, 743008120140, 8230246567620, 91708459194066, 1027134771622388, 11555266154065920, 130506535690613940
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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LINKS
| 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
| "CHK" (necklace, identity, unlabeled) transform of 12, 0, 0, 0...
Sum mu(d)*12^(n/d)/n; d|n.
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CROSSREFS
| Sequence in context: A036399 A200190 A165107 * A039925 A091074 A117088
Adjacent sequences: A032164 A032165 A032166 * A032168 A032169 A032170
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KEYWORD
| nonn
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AUTHOR
| Christian G. Bower (bowerc(AT)usa.net)
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