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A161004 ((2^b-1)/phi(n))*Sum_{d|n} Moebius(n/d)*d^(b-1) for b = 12. 1
4095, 8382465, 362706435, 8583644160, 49987791945, 742460072445, 1349525501415, 8789651619840, 21417452280315, 102325010111415, 116835129114795, 760279114183680, 611574734464785, 2762478701396505 (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..14.

CROSSREFS

Sequence in context: A123868 A321557 A321551 * A022194 A069387 A069413

Adjacent sequences:  A161001 A161002 A161003 * A161005 A161006 A161007

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Nov 19 2009

STATUS

approved

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Last modified January 22 13:41 EST 2020. Contains 331149 sequences. (Running on oeis4.)