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A324446
Number of labeled cyclic chord diagrams with n chords such that the minimal chord length equals two.
2
1, 3, 24, 225, 2489, 32326, 483968, 8211543, 155740501, 3265307342, 74995101843, 1872508994356, 50500982610620, 1463062187672336, 45314261742435296, 1494164679669072424, 52257665502536426741, 1932255827699763531474, 75312621088768346098203
OFFSET
2,2
LINKS
FORMULA
a(n) = A003436(n) - A306386(n).
CROSSREFS
Column k=2 of A324429.
Sequence in context: A370986 A279973 A274737 * A307514 A225107 A249926
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Feb 28 2019
STATUS
approved