login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A130629 Number of virtual knots of crossing number n, counting only classical crossings. Mirror images and inverses are not distinguished. 0

%I

%S 1,0,1,7,108,2448,90235

%N Number of virtual knots of crossing number n, counting only classical crossings. Mirror images and inverses are not distinguished.

%H Jeremy Green, <a href="http://www.math.toronto.edu/~drorbn/Students/GreenJ/">virtual knot table</a>.

%H Louis Kauffman, <a href="https://arxiv.org/abs/math/9811028">Virtual knot theory</a>, arXiv:math/9811028 [math.GT], 1998-2006.

%H Louis Kauffman, <a href="https://doi.org/10.1006/eujc.1999.0314">Virtual knot theory</a>, European J. Comb. (1999) Vol. 20, 663-690.

%K nonn,more

%O 0,4

%A Chan-Ho Suh (suh(AT)math.ucdavis.edu), Aug 11 2007

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 18 13:13 EST 2021. Contains 340254 sequences. (Running on oeis4.)