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A032198 "CIK" (necklace, indistinct, unlabeled) transform of 1,2,3,4... 2
1, 3, 6, 13, 25, 58, 121, 283, 646, 1527, 3601, 8678, 20881, 50823, 124054, 304573, 750121, 1855098, 4600201, 11442085, 28527446, 71292603, 178526881, 447919418, 1125750145, 2833906683, 7144450566, 18036423973 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

LINKS

Index entries for sequences related to necklaces

C. G. Bower, Transforms (2)

FORMULA

1/n*Sum_{d divides n} phi(n/d)*A004146(d). - Vladeta Jovovic (vladeta(AT)eunet.rs), Feb 15 2003

CROSSREFS

Cf. A032170.

Equals A005594(n)-1.

Sequence in context: A005116 A121349 A074890 * A079941 A019300 A072762

Adjacent sequences:  A032195 A032196 A032197 * A032199 A032200 A032201

KEYWORD

nonn

AUTHOR

Christian G. Bower (bowerc(AT)usa.net)

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Last modified February 15 21:56 EST 2012. Contains 205860 sequences.