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A160898 ((2^b-1)/phi(n))*Sum_{d|n} Moebius(n/d)*d^(b-1) for b = 7. 0
127, 8001, 46228, 256032, 496062, 2912364, 2490216, 8193024, 11233404, 31251906, 22498812, 93195648, 51083718, 156883608, 180566568, 262176768, 191591946, 707704452, 331934820, 1000060992, 906438624, 1417425156, 854570808 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

J. H. Kwak and J. Lee, Enumeration of graph coverings, surface branched coverings and related group theory, in Combinatorial and Computational Mathematics (Pohang, 2000), ed. S. Hong et al., World Scientific, Singapore 2001, pp. 97-161. See p. 134.

LINKS

Table of n, a(n) for n=1..23.

FORMULA

a(n) = 127*A160895(n). - R. J. Mathar, Mar 15 2016

CROSSREFS

Sequence in context: A137789 A268663 A005464 * A140477 A110828 A286790

Adjacent sequences:  A160895 A160896 A160897 * A160899 A160900 A160901

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Nov 19 2009

STATUS

approved

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Last modified July 24 05:48 EDT 2019. Contains 325290 sequences. (Running on oeis4.)