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A130629 Number of virtual knots of crossing number n, counting only classical crossings. Mirror images and inverses are not distinguished. 0
1, 0, 1, 7, 108, 2448, 90235 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..6.

Jeremy Green, virtual knot table.

Louis Kauffman, Virtual knot theory, arXiv:math/9811028 [math.GT], 1998-2006.

Louis Kauffman, Virtual knot theory, European J. Comb. (1999) Vol. 20, 663-690.

CROSSREFS

Sequence in context: A297804 A218819 A033516 * A137648 A106977 A142480

Adjacent sequences:  A130626 A130627 A130628 * A130630 A130631 A130632

KEYWORD

nonn,more

AUTHOR

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

STATUS

approved

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Last modified December 2 21:48 EST 2020. Contains 338896 sequences. (Running on oeis4.)