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A112615 Related to enumeration of branched orientable surface coverings over a non-orientable surface. 0

%I

%S 1,71,23778

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

%C See reference for more information.

%H I. P. Goulden, J. H. Kwak and J. Lee, <a href="https://doi.org/10.1016/j.disc.2003.10.030">Enumerating branched orientable surface coverings over a non-orientable surface</a>, Discr. Math. 303 (2005), 42-55.

%K nonn,bref

%O 1,2

%A _N. J. A. Sloane_, Dec 23 2005

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Last modified August 17 05:07 EDT 2022. Contains 356184 sequences. (Running on oeis4.)