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A056365
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Number of primitive (period n) bracelet structures using a maximum of six different colored beads.
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1
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1, 1, 2, 5, 11, 33, 91, 342, 1305, 5940, 28227, 144545, 760109, 4112455, 22571026, 125410006, 702370207, 3959138462, 22425417823, 127530807883, 727630240442, 4163114784625, 23876534534361, 137228556011456
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| Turning over will not create a new bracelet. Permuting the colors of the beads will not change the structure.
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REFERENCES
| M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.
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FORMULA
| sum mu(d)*A056356(n/d) where d|n.
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CROSSREFS
| Cf. A056302.
Sequence in context: A151395 A056364 A205799 * A006400 A080068 A196690
Adjacent sequences: A056362 A056363 A056364 * A056366 A056367 A056368
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KEYWORD
| nonn
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AUTHOR
| Marks R. Nester (nesterm(AT)dpi.qld.gov.au)
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