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%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
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