A160871 Column 6 of array in A057004.

1, 63, 7987, 7987616, 24875000437, 193466859054994

Offset

1,2

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.

Links

Table of n, a(n) for n=1..6.

Crossrefs

Sequence in context: A069433 A178634 A174763 * A183525 A279043 A234629

Adjacent sequences: A160868 A160869 A160870 * A160872 A160873 A160874

Keyword

nonn

Author

N. J. A. Sloane, Nov 15 2009

Status

approved