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A089892 Number of knots with unknotting number U=1. 3
1, 1, 1, 3, 3, 9, 17, 44 (list; graph; refs; listen; history; text; internal format)
OFFSET
3,4
REFERENCES
A. Kawauchi, A Survey of Knot Theory, Birkhäuser, Basel, Boston, Berlin, 1996.
LINKS
Slavik Jablan, Ordering Knots.
Slavik Jablan and Radmila Sazdanovic, LinKnot.
CROSSREFS
Cf. A078477.
Sequence in context: A232948 A241357 A217450 * A038221 A099465 A099094
KEYWORD
nonn,more
AUTHOR
Slavik Jablan and Radmila Sazdanovic, Jan 10 2004
STATUS
approved

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Last modified April 21 17:36 EDT 2024. Contains 371874 sequences. (Running on oeis4.)