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A018192 Number of chord diagrams of degree n with an isolated chord. 0
1, 1, 3, 11, 70, 607, 6577, 85198, 1276563, 21695178 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

REFERENCES

Bar-Natan, Dror, On the Vassiliev knot invariants. Topology 34, No. 2, 423-472 (1995).

LINKS

Table of n, a(n) for n=1..10.

D. Bar-Natan, Bibliography of Vassiliev Invariants

Alexander Stoimenow, On the number of chord diagrams, Discr. Math. 218 (2000), 209-233.

CROSSREFS

Sequence in context: A121945 A009025 A009103 * A056665 A127716 A035378

Adjacent sequences:  A018189 A018190 A018191 * A018193 A018194 A018195

KEYWORD

nonn

AUTHOR

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

STATUS

approved

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Last modified December 10 00:24 EST 2016. Contains 278993 sequences.