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⇱ A066314 - OEIS

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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.
2
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
OFFSET
1,5
FORMULA
a(n)=A001037(n)-A066313(n).
CROSSREFS
Sequence in context: A363129 A325243 A319271 * A083336 A225436 A183811
KEYWORD
nonn
AUTHOR
Christian G. Bower, Dec 13 2001
STATUS
approved