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A022489 An upper bound for linearized chord diagrams. 0
0, 1, 1, 3, 5, 18, 61, 357, 2330, 18715, 167783, 1686327, 18615873, 224310263, 2926679435, 41112186396, 618573033369, 9924788849845, 169150125371328, 3051766556302719 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

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, [DOI]

CROSSREFS

Sequence in context: A196420 A199676 A303684 * A176749 A145774 A270894

Adjacent sequences:  A022486 A022487 A022488 * A022490 A022491 A022492

KEYWORD

nonn

AUTHOR

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

STATUS

approved

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Last modified December 7 09:33 EST 2019. Contains 329843 sequences. (Running on oeis4.)