A022490 - OEIS

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A022490

An upper bound for linearized chord diagrams.

1, 2, 3, 6, 11, 29, 90, 447, 2777, 21492, 189275, 1875602, 20491475, 244801738, 3171481173, 44283667569, 662856700938, 10587645550783, 179737770922111, 3231504327224830

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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: A356715 A324768 A086209 * A102952 A369223 A065653

Adjacent sequences: A022487 A022488 A022489 * A022491 A022492 A022493

KEYWORD

nonn

AUTHOR

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

STATUS

approved