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A112615
Related to enumeration of branched orientable surface coverings over a non-orientable surface.
0
1, 71, 23778
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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 April 27 12:42 EDT 2024. Contains 372019 sequences. (Running on oeis4.)