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A066315 Number of aperiodic bracelets (or necklaces) with n red and blue beads such that the beads switch colors when bracelet is turned over. 2
1, 1, 3, 7, 20, 51, 154, 460, 1476, 4860, 16544, 57321, 202059, 720370, 2593470, 9408000, 34350506, 126108252, 465200332, 1723341185, 6408356052, 23911255544, 89495909408, 335916703284, 1264114452975, 4768464107355 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..26.

Index entries for sequences related to bracelets

FORMULA

Moebius transform of A006080(n+1).

CROSSREFS

Sequence in context: A281971 A230352 A271894 * A058499 A003097 A109220

Adjacent sequences:  A066312 A066313 A066314 * A066316 A066317 A066318

KEYWORD

nonn

AUTHOR

Christian G. Bower, Dec 13 2001

STATUS

approved

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Last modified April 25 23:48 EDT 2019. Contains 322465 sequences. (Running on oeis4.)