A112617 Related to enumeration of branched orientable surface coverings over a non-orientable surface.

1, 39, 1483, 354009, 208211284

Offset

1,2

Comments

See reference for more information.

Links

Table of n, a(n) for n=1..5.

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: A170720 A170758 A218741 * A009983 A269028 A158768

Adjacent sequences: A112614 A112615 A112616 * A112618 A112619 A112620

Keyword

nonn,more

Author

N. J. A. Sloane, Dec 23 2005

Status

approved