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A066314 Number of identity (asymmetric) bracelets (or necklaces) with n red or blue beads such that the beads switch colors when bracelet is turned over. 0
1, 0, 1, 1, 3, 3, 9, 12, 28, 42, 93, 154, 315, 549, 1091, 1980, 3855, 7140, 13797, 25941, 49929, 94767, 182361, 348430, 671088, 1288350, 2485504, 4789134, 9256395, 17886951, 34636833, 67091520, 130150493, 252610440, 490853403 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Table of n, a(n) for n=1..35.

Index entries for sequences related to bracelets

FORMULA

a(n)=A001037(n)-A066313(n).

CROSSREFS

Sequence in context: A166720 A325243 A319271 * A083336 A225436 A183811

Adjacent sequences:  A066311 A066312 A066313 * A066315 A066316 A066317

KEYWORD

nonn

AUTHOR

Christian G. Bower, Dec 13 2001

STATUS

approved

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Last modified July 23 16:14 EDT 2019. Contains 325258 sequences. (Running on oeis4.)