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A007474 Circular diagrams with n chords.
(Formerly M1800)
+0
1
1, 0, 1, 2, 7, 36, 300, 3218, 42335, 644808 (list; graph; listen)
OFFSET

0,4

REFERENCES

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

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

D. Bar-Natan, Bibliography of Vassiliev Invariants

CROSSREFS

Sequence in context: A012363 A012717 A072236 this_sequence A002724 A029990 A042465

Adjacent sequences: A007471 A007472 A007473 this_sequence A007475 A007476 A007477

KEYWORD

hard,nonn,nice

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.


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