A022491 An upper bound for linearized chord diagrams.

0, 1, 2, 6, 18, 72, 321, 1680, 9852, 64168, 457659, 3543785, 29578097, 264623046, 2525897073, 25622275565, 275257714175, 3122190896616, 37290114445901, 467812869356846

Offset

1,3

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.

Crossrefs

Sequence in context: A177472 A364849 A194088 * A004395 A277862 A213427

Adjacent sequences: A022488 A022489 A022490 * A022492 A022493 A022494

Keyword

nonn,more

Author

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

Status

approved