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A112615 Related to enumeration of branched orientable surface coverings over a non-orientable surface. 0
1, 71, 23778 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

See reference for more information.

LINKS

Table of n, a(n) for n=1..3.

I. P. Goulden, J. H. Kwak and J. Lee, Enumerating branched orientable surface coverings over a non-orientable surface, Discr. Math. 303 (2005), 42-55.

CROSSREFS

Sequence in context: A208679 A220980 A033527 * A243665 A243686 A131454

Adjacent sequences:  A112612 A112613 A112614 * A112616 A112617 A112618

KEYWORD

nonn,bref

AUTHOR

N. J. A. Sloane, Dec 23 2005

STATUS

approved

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Last modified October 31 11:50 EDT 2020. Contains 338101 sequences. (Running on oeis4.)