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Number of knots and links with unknotting (unlinking) number U=1.
3

%I #11 Nov 10 2023 03:03:02

%S 1,1,1,2,3,5,12,21

%N Number of knots and links with unknotting (unlinking) number U=1.

%D A. Kawauchi, A Survey of Knot Theory, Birkhäuser, Basel, Boston, Berlin, 1996.

%H Slavik Jablan, <a href="http://www.mi.sanu.ac.rs/vismath/sl/index.html">Ordering Knots</a>.

%H Slavik Jablan and Radmila Sazdanovic, <a href="http://www.mi.sanu.ac.rs/vismath/linknot/index.html">LinKnot</a>.

%H P. Kohn, <a href="https://projecteuclid.org/journals/osaka-journal-of-mathematics/volume-30/issue-4/Unlinking-two-component-links/ojm/1200784732.full">Unlinking two component links</a>, Osaka J. Math. 30(4), 741-752 (1993).

%Y Cf. A078477.

%K nonn,more

%O 2,4

%A Slavik Jablan and Radmila Sazdanovic, Jan 10 2004