|
| |
|
|
A056515
|
|
Number of primitive (period n) periodic palindromic structures using a maximum of four different symbols.
|
|
2
| |
|
|
1, 1, 1, 3, 4, 10, 14, 35, 49, 127, 186, 463, 714, 1799, 2789, 6996
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,4
|
|
|
COMMENTS
| For example, aaabbb is not a (finite) palindrome but it is a periodic palindrome. 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)*A056505(n/d) where d|n.
Moebius transform of A056505.
|
|
|
CROSSREFS
| Cf. A056478.
Sequence in context: A106523 A121720 A007068 * A056516 A056517 A048155
Adjacent sequences: A056512 A056513 A056514 * A056516 A056517 A056518
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Marks R. Nester (nesterm(AT)dpi.qld.gov.au)
|
| |
|
|
