|
Search: id:A056291
|
|
|
| A056291 |
|
Number of primitive (period n) n-bead necklaces with exactly six different colored beads. |
|
+0
3
|
|
| 0, 0, 0, 0, 0, 120, 2160, 23940, 211680, 1643544, 11748240, 79419060, 516257280, 3262440960, 20193277104, 123071683140, 741419995680, 4427489935680, 26264144909520, 155018839412052, 911509010152560
(list; graph; listen)
|
|
|
OFFSET
|
1,6
|
|
|
COMMENT
|
Turning over the necklace is not allowed.
|
|
REFERENCES
|
M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.
|
|
FORMULA
|
Sum mu(d)*A056286(n/d) where d|n.
|
|
CROSSREFS
|
Cf. A032164.
Sequence in context: A052767 A110839 A084030 this_sequence A056286 A038745 A032180
Adjacent sequences: A056288 A056289 A056290 this_sequence A056292 A056293 A056294
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Marks R. Nester (nesterm(AT)dpi.qld.gov.au)
|
|
|
Search completed in 0.002 seconds
|
