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A056369 Number of primitive (period n) bracelet structures using exactly five different colored beads. 1
0, 0, 0, 0, 1, 3, 16, 85, 434, 2270, 11530, 58397, 290689, 1436669, 7036417, 34286379, 166316979, 804556969, 3884248150, 18731031687, 90269841908, 434955103451, 2096028083116, 10104206843502 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,6

COMMENTS

Turning over will not create a new bracelet. Permuting the colors of the beads will not change the structure.

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..24.

FORMULA

A056364(n)-A056363(n).

CROSSREFS

Column 5 of A276543.

Cf. A056306.

Sequence in context: A151328 A277923 A076279 * A056360 A278681 A224869

Adjacent sequences:  A056366 A056367 A056368 * A056370 A056371 A056372

KEYWORD

nonn

AUTHOR

Marks R. Nester

STATUS

approved

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Last modified October 23 18:48 EDT 2018. Contains 316530 sequences. (Running on oeis4.)