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Asymptotic estimate for A054499(n).
Table of n, a(n) for n=1..19.
A. Khruzin, Enumeration of chord diagrams
Sequence in context: A015553 A291028 A071878 * A289211 A192887 A321190
Adjacent sequences: A104253 A104254 A104255 * A104257 A104258 A104259
Ralf Stephan, Mar 02 2005