|
Search: id:A056519
|
|
|
| A056519 |
|
Number of primitive (period n) periodic palindromic structures using exactly three different symbols. |
|
+0
1
|
|
| 0, 0, 0, 1, 1, 5, 6, 18, 25, 63, 90, 202, 301, 650, 965, 2016
(list; graph; listen)
|
|
|
OFFSET
|
1,6
|
|
|
REFERENCES
|
M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.
|
|
FORMULA
|
A056514(n)-A056513(n).
|
|
EXAMPLE
|
For example, aaabbb is not a (finite) palindrome but it is a periodic palindrome. Permuting the symbols will not change the structure.
|
|
CROSSREFS
|
Cf. A056482.
Sequence in context: A078981 A041555 A041747 this_sequence A063445 A031448 A163772
Adjacent sequences: A056516 A056517 A056518 this_sequence A056520 A056521 A056522
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Marks R. Nester (nesterm(AT)dpi.qld.gov.au)
|
|
|
Search completed in 0.002 seconds
|
