|
Search: id:A056329
|
|
|
| A056329 |
|
Number of reversible string structures with n beads using exactly five different colors. |
|
+0
1
|
|
| 0, 0, 0, 0, 1, 9, 76, 542, 3523, 21393, 123680, 690550, 3756151, 20042589, 105394296, 548123982, 2826435403, 14479204833, 73794961960, 374603884910, 1895632969351, 9568915372269, 48208452866816
(list; graph; listen)
|
|
|
OFFSET
|
1,6
|
|
|
COMMENT
|
A string and its reverse are considered to be equivalent. Permuting the colors 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
|
A056324(n)-A056323(n).
|
|
CROSSREFS
|
Cf. A056312.
Sequence in context: A066222 A080254 A056339 this_sequence A082677 A075608 A126631
Adjacent sequences: A056326 A056327 A056328 this_sequence A056330 A056331 A056332
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Marks R. Nester (nesterm(AT)dpi.qld.gov.au)
|
|
|
Search completed in 0.002 seconds
|
