OFFSET
0,5
REFERENCES
Peter R. Cromwell, Knots and Links, Cambridge University Press, 2004. See p. 146, Fig. 6.6.
EXAMPLE
a(0) = 1 because the only prime knot with no more than 9 crossings with determinant 2*0+1=1 and s=0 is 0_1, the unknot.
a(2) = 1 because the only prime knot with no more than 9 crossings with determinant 2*2+1=5 and s=0 is 4_1, the figure-8 knot.
a(4) = 3 because the three prime knots with no more than 9 crossings with determinant 2*4+1=9 and s=0 are 6_1, 8_20, and 9_46.
CROSSREFS
KEYWORD
nonn,fini,full
AUTHOR
Jonathan Vos Post, Nov 20 2010
EXTENSIONS
Partially edited by N. J. A. Sloane, Jun 10 2019
Edited by Andrey Zabolotskiy, Apr 29 2024
STATUS
approved