A056360 - OEIS

A056360

Number of bracelet structures using exactly five different colored beads.

0, 0, 0, 0, 1, 3, 16, 85, 434, 2271, 11530, 58400, 290689, 1436685, 7036418, 34286464, 166316979, 804557406, 3884248150, 18731033958, 90269841924, 434955114981, 2096028083116, 10104206901987, 48733744753173, 235196202817401, 1135892957109815, 5490007141743186

(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

Andrew Howroyd, Table of n, a(n) for n = 1..200

FORMULA

a(n) = A056355(n) - A056354(n).

CROSSREFS

Column 5 of A152176.

Cf. A056298, A056354, A056355, A214311.

Sequence in context: A277923 A076279 A056369 * A278681 A224869 A163604

Adjacent sequences: A056357 A056358 A056359 * A056361 A056362 A056363

KEYWORD

nonn

AUTHOR

Marks R. Nester

EXTENSIONS

Terms a(25) and beyond from Andrew Howroyd, Oct 24 2019

STATUS

approved