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A018193 Number of chord diagrams of degree n with an isolated chord of length 1. +0
1
1, 1, 3, 11, 69, 602, 6531, 84737, 1271143, 21623667 (list; graph; listen)
OFFSET

1,3

LINKS

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

Bar-Natan, Dror, On the Vassiliev Knot Invariants, Topology 34 (1995) 423-472.

D. Bar-Natan, Bibliography of Vassiliev Invariants

CROSSREFS

Sequence in context: A077428 A074504 A126115 this_sequence A121945 A009025 A009103

Adjacent sequences: A018190 A018191 A018192 this_sequence A018194 A018195 A018196

KEYWORD

nonn

AUTHOR

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

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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