A056352 - OEIS

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A056352

Number of primitive (period n) bracelets using exactly six different colored beads.

0, 0, 0, 0, 0, 60, 1080, 11970, 105840, 821952, 5874480, 39713490, 258136200, 1631272140, 10096734312, 61536365730, 370710950400, 2213749552980, 13132080672480, 77509456122366, 455754569691600

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,6

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. [See A056391 for pdf file of Chap. 2]

LINKS

Table of n, a(n) for n=1..21.

FORMULA

Sum mu(d)*A056346(n/d) where d|n.

CROSSREFS

Cf. A056291.

Sequence in context: A271651 A223348 A305545 * A056346 A283722 A105252

Adjacent sequences: A056349 A056350 A056351 * A056353 A056354 A056355

KEYWORD

nonn

AUTHOR

Marks R. Nester

STATUS

approved