OFFSET
1,2
LINKS
Evgeniy Krasko, Counting Unlabelled Chord Diagrams of Maximal Genus, arXiv:1709.00796 [math.CO], 2017. See Table 1, column 3.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Sep 20 2017
EXTENSIONS
Name clarified by Evgeniy Krasko, Sep 30 2017
STATUS
approved