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A022490 An upper bound for linearized chord diagrams. 1
1, 2, 3, 6, 11, 29, 90, 447, 2777, 21492, 189275, 1875602, 20491475, 244801738, 3171481173, 44283667569, 662856700938, 10587645550783, 179737770922111, 3231504327224830 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..20.

A. Stoimenow, Enumeration of chord diagrams and an upper bound for Vassiliev invariants, J. Knot Theory Ramifications, 7 (1998), no. 1, 93-114. [broken link] [DOI]

CROSSREFS

Cf. A022492.

Sequence in context: A115114 A324768 A086209 * A102952 A065653 A275783

Adjacent sequences:  A022487 A022488 A022489 * A022491 A022492 A022493

KEYWORD

nonn

AUTHOR

Alexander Stoimenow (stoimeno(AT)math.toronto.edu)

STATUS

approved

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Last modified November 20 20:40 EST 2019. Contains 329347 sequences. (Running on oeis4.)