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A018891 Number of positive knots with n crossings. 1
0, 0, 1, 0, 1, 0, 1, 1, 1, 3, 2, 7, 9, 17, 47 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,10

LINKS

Table of n, a(n) for n=1..15.

D. J. Broadhurst and D. Kreimer, Association of multiple zeta values with positive knots via Feynman diagrams up to 9 loops, Phys. Lett. B 393, No.3-4, 403-412 (1997).

Index entries for sequences related to knots

CROSSREFS

Sequence in context: A026210 A257326 A118966 * A034423 A193859 A174330

Adjacent sequences:  A018888 A018889 A018890 * A018892 A018893 A018894

KEYWORD

nonn,nice

AUTHOR

David Broadhurst

STATUS

approved

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Last modified September 16 11:47 EDT 2021. Contains 347472 sequences. (Running on oeis4.)