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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

Kawauchi, A. (1996) A Survey of Knot Theory, Birkhauser, Basel, Boston, Berlin.

LINKS

Table of n, a(n) for n=3..10.

Jablan S., Ordering Knots.

Jablan S., Sazdanovic R., LinKnot.

CROSSREFS

Cf. A078477.

Sequence in context: A232948 A241357 A217450 * A038221 A099465 A099094

Adjacent sequences:  A089889 A089890 A089891 * A089893 A089894 A089895

KEYWORD

nonn,more

AUTHOR

Slavik Jablan and Radmila Sazdanovic, Jan 10 2004

STATUS

approved

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Last modified January 24 13:24 EST 2020. Contains 331193 sequences. (Running on oeis4.)