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Search: id:A056362
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| A056362 |
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Number of primitive (period n) bracelet structures using a maximum of three different colored beads. |
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+0
3
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| 1, 1, 2, 4, 8, 18, 39, 94, 222, 572, 1463, 3934, 10584, 29211, 80808, 226430, 636320, 1800318, 5107479, 14548360, 41538874, 118927919, 341187047, 980838750, 2824561080, 8147547156, 23536592010
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OFFSET
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1,3
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COMMENT
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Turning over will not create a new bracelet. Permuting the colors of the beads will not change the structure.
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REFERENCES
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M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.
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FORMULA
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Sum mu(d)*A056353(n/d) where d divides n.
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CROSSREFS
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Cf. A002075.
Sequence in context: A024415 A018096 A110110 this_sequence A086585 A052910 A000967
Adjacent sequences: A056359 A056360 A056361 this_sequence A056363 A056364 A056365
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KEYWORD
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nonn
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AUTHOR
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Marks R. Nester (nesterm(AT)dpi.qld.gov.au)
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