|
| |
|
|
A032275
|
|
Number of bracelets (turn over necklaces) of n beads of 4 colors.
|
|
5
| |
|
|
4, 10, 20, 55, 136, 430, 1300, 4435, 15084, 53764, 192700, 704370, 2589304, 9608050, 35824240, 134301715, 505421344, 1909209550, 7234153420, 27489127708, 104717491064, 399827748310, 1529763696820
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
LINKS
| C. G. Bower, Transforms (2)
F. Ruskey, Necklaces, Lyndon words, De Bruijn sequences, etc.
Index entries for sequences related to bracelets
|
|
|
FORMULA
| "DIK" (bracelet, indistinct, unlabeled) transform of 4, 0, 0, 0...
|
|
|
CROSSREFS
| Sequence in context: A015889 A020149 A056412 * A015220 A047199 A038065
Adjacent sequences: A032272 A032273 A032274 * A032276 A032277 A032278
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Christian G. Bower (bowerc(AT)usa.net)
|
| |
|
|
