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A007293
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Dimension of space of weight systems of chord diagrams.
(Formerly M2356)
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2
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1, 0, 1, 1, 3, 4, 9, 14, 27, 44, 80, 132, 232
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,5
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REFERENCES
| N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
| Birman, Joan S., New points of view in knot theory (amstex), Bull. Amer. Math. Soc. (N.S.) 28 (1993), no. 2, 253-287.
D. J. Broadhurst, Conjectured enumeration of Vassiliev invariants.
Jan Kneissler, The number of primitive Vassiliev invariants of degree up to 12
Bar-Natan, Dror, On the Vassiliev Knot Invariants, Topology 34 (1995) 423-472.
D. Bar-Natan, Bibliography of Vassiliev Invariants
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FORMULA
| Broadhurst gives a conjectured g.f.
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CROSSREFS
| Cf. A007473, A007478.
Cf. A014596.
Sequence in context: A050163 A207016 A095292 * A014596 A002823 A109509
Adjacent sequences: A007290 A007291 A007292 * A007294 A007295 A007296
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
| Description corrected by Sergei Duzhin (duzhin(AT)botik.ru), Aug 29 2000
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