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Search: id:A056301
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| A056301 |
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Number of primitive (period n) n-bead necklace structures using a maximum of five different colored beads. |
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+0
4
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| 1, 1, 2, 5, 11, 38, 122, 496, 2005, 8707, 38364, 173562, 792827, 3662800, 17034367, 79702578, 374624253, 1767881397, 8370666416, 39751064122, 189262621739, 903220020390, 4319518316898, 20697040024784
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OFFSET
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1,3
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COMMENT
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Turning over the necklace is not allowed. Colors may be permuted without changing the necklace 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)*A056293(n/d) where d|n and n>0.
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CROSSREFS
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Cf. A001692.
Sequence in context: A156014 A092298 A131581 this_sequence A001344 A056302 A065850
Adjacent sequences: A056298 A056299 A056300 this_sequence A056302 A056303 A056304
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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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