|
| |
|
|
A056443
|
|
Number of primitive (period n) step cyclic shifted sequence structures using a maximum of six different symbols.
|
|
1
| |
|
|
1, 1, 2, 5, 7, 33, 35, 212, 449, 2991, 5651, 74919, 126757, 1370979, 5653844, 31440622, 87796361, 1319721998, 2491714133, 31893714060, 121274777190, 832622957033, 2170594048581, 34308978905916
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,3
|
|
|
COMMENTS
| See A056371 for an explanation of step shifts. Under step cyclic shifts, abcde, bdace, bcdea, cdeab and daceb etc. are equivalent. Permuting the symbols will not change the structure.
|
|
|
REFERENCES
| M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.
|
|
|
FORMULA
| sum mu(d)*A056433(n/d) where d|n.
|
|
|
CROSSREFS
| Cf. A056423.
Sequence in context: A118786 A083777 A056442 * A042931 A085394 A041875
Adjacent sequences: A056440 A056441 A056442 * A056444 A056445 A056446
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Marks R. Nester (nesterm(AT)dpi.qld.gov.au)
|
| |
|
|
