login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A056358 Number of bracelet structures using exactly three different colored beads. 4
0, 0, 1, 2, 5, 14, 31, 82, 202, 538, 1401, 3838, 10395, 28890, 80207, 225368, 634265, 1796648, 5100325, 14535298, 41513434, 118880650, 341094843, 980665898, 2824223495, 8146908210, 23535345372 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

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..27.

FORMULA

A056353(n)-A000011(n).

CROSSREFS

Column 3 of A152176.

Cf. A056296, A214307.

Sequence in context: A120328 A026011 A212393 * A296502 A036681 A125615

Adjacent sequences:  A056355 A056356 A056357 * A056359 A056360 A056361

KEYWORD

nonn

AUTHOR

Marks R. Nester

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 15 16:12 EDT 2019. Contains 327078 sequences. (Running on oeis4.)