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A056347 Number of primitive (period n) bracelets using a maximum of six different colored beads. 1
6, 15, 50, 210, 882, 4220, 20640, 107100, 563730, 3036411, 16514100, 90778485, 502474350, 2799199380, 15673672238, 88162569180, 497847963690, 2821127257950, 16035812864940, 91404065292036 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

Turning over will not create a new bracelet.

REFERENCES

M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.

FORMULA

sum mu(d)*A056341(n/d) where d|n.

CROSSREFS

Cf. A032164.

Sequence in context: A082637 A106272 A056423 * A122365 A119132 A073065

Adjacent sequences:  A056344 A056345 A056346 * A056348 A056349 A056350

KEYWORD

nonn

AUTHOR

Marks R. Nester (nesterm(AT)dpi.qld.gov.au)

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Last modified February 16 04:47 EST 2012. Contains 205860 sequences.