

A094029


Number of ncrossing links with alternating braids of 3 strands.


3



1, 1, 4, 5, 13, 18, 38, 57, 115, 183, 354, 604, 1153, 2047, 3904, 7145, 13637, 25471, 48722, 92193
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OFFSET

4,3


COMMENTS

Series is sum of three series for 1, 2 and 3 component links with alternating braids of 3 strands.


REFERENCES

K. Murasugi and B. J. Kurpita, A Study of Braids, Kluwer Academic Publishers (1999), pp. 127166


LINKS



EXAMPLE

4 crossing knot (1 component link) can be represented as 3strand braid AbAb that is alternating (overcrossings and undercrossing alternate).


CROSSREFS



KEYWORD

nonn,more


AUTHOR



STATUS

approved



