A112612 Related to enumeration of branched orientable surface coverings over a non-orientable surface.

3, 26, 624

Offset

1,1

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: A112676 A103112 A064941 * A129430 A005156 A355120

Adjacent sequences: A112609 A112610 A112611 * A112613 A112614 A112615

Keyword

nonn,bref

Author

N. J. A. Sloane, Dec 23 2005

Status

approved