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A291172 Number of maximal chord diagrams of genus g counted up to rotations. 2
1, 4, 131, 14118, 2976853, 1013582110, 508233789579, 352755124921122, 324039613564554401, 380751174738424280720, 557175918657122229139987, 993806827312044893602464496 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Also: the number of non-isomorphic one-face one-vertex maps on a genus g surface under orientation-preserving isomorphisms.

LINKS

Table of n, a(n) for n=1..12.

Robert Cori, Michel Marcus, Counting non-isomorphic chord diagrams, Theoretical Computer Science, Volume 204, Issue 1, 1998, Pages 55-73.

Evgeniy Krasko, Counting Unlabelled Chord Diagrams of Maximal Genus, arXiv:1709.00796 [math.CO], 2017.

CROSSREFS

Sequence in context: A003371 A113253 A201977 * A194536 A064227 A204079

Adjacent sequences:  A291169 A291170 A291171 * A291173 A291174 A291175

KEYWORD

nonn

AUTHOR

Evgeniy Krasko, Sep 03 2017

STATUS

approved

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Last modified January 18 20:19 EST 2018. Contains 297865 sequences.