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A056350 Number of primitive (period n) bracelets using exactly four different colored beads. 1
0, 0, 0, 3, 24, 136, 612, 2616, 10480, 41364, 159780, 613919, 2341920, 8919204, 33905164, 128904660, 490213680, 1866117224, 7111777860, 27140327757, 103721217388, 396974621676, 1521577377012, 5840546872280 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
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
FORMULA
Sum mu(d)*A056344(n/d) where d|n.
CROSSREFS
Cf. A056289.
Sequence in context: A069515 A206949 A215636 * A056344 A201231 A212698
KEYWORD
nonn
AUTHOR
STATUS
approved

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Last modified July 21 14:09 EDT 2024. Contains 374474 sequences. (Running on oeis4.)