|
Search: id:A056301
|
|
|
| A056301 |
|
Number of primitive (period n) n-bead necklace structures using a maximum of five different colored beads. |
|
+0
4
|
|
| 1, 1, 2, 5, 11, 38, 122, 496, 2005, 8707, 38364, 173562, 792827, 3662800, 17034367, 79702578, 374624253, 1767881397, 8370666416, 39751064122, 189262621739, 903220020390, 4319518316898, 20697040024784
(list; graph; listen)
|
|
|
OFFSET
|
1,3
|
|
|
COMMENT
|
Turning over the necklace is not allowed. Colors may be permuted without changing the necklace structure.
|
|
REFERENCES
|
M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.
|
|
FORMULA
|
sum mu(d)*A056293(n/d) where d|n and n>0.
|
|
CROSSREFS
|
Cf. A001692.
Sequence in context: A112600 A092298 A131581 this_sequence A001344 A056302 A065850
Adjacent sequences: A056298 A056299 A056300 this_sequence A056302 A056303 A056304
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Marks R. Nester (nesterm(AT)dpi.qld.gov.au)
|
|
|
Search completed in 0.002 seconds
|
