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A007293
Dimension of space of weight systems of chord diagrams.
(Formerly M2356)
5
1, 0, 1, 1, 3, 4, 9, 14, 27, 44, 80, 132, 232
OFFSET
0,5
REFERENCES
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
LINKS
D. Bar-Natan, On the Vassiliev Knot Invariants, Topology 34 (1995) 423-472.
J. S. Birman, New points of view in knot theory.. Bulletin of the American Mathematical Society 28.2 (1993): 253-287.
T. Ohtsuki (ed.), Problems on invariants of knots and 3-manifolds, arXiv:math/0406190 [math.GT], (2004); see Table 3 on p.408.
Evert Stenlund, On the Vassiliev Invariants, June 2017.
S. D. Tyurina, Diagram invariants of knots and the Kontsevich integral, J. Math. Sci. 134 (2) (2006) 2017-2017, Table 1.
FORMULA
Broadhurst gives a conjectured g.f.
CROSSREFS
Cf. A014596.
Sequence in context: A376535 A095292 A263821 * A014596 A002823 A109509
KEYWORD
nonn,more
EXTENSIONS
Description corrected by Sergei Duzhin, Aug 29 2000
STATUS
approved