A022492 - OEIS

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A022492

An upper bound for linearized chord diagrams.

1

1, 2, 4, 10, 28, 100, 421, 2101, 11953, 76121, 533780, 4077565, 33655662, 298278708, 2824175781, 28446451346, 303704165521, 3425895062137, 40716009508038, 508528878864884

(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

Sequence in context: A374154 A085549 A374174 * A352068 A123429 A207018

Adjacent sequences: A022489 A022490 A022491 * A022493 A022494 A022495

KEYWORD

nonn

AUTHOR

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

STATUS

approved