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%I #8 Dec 29 2012 18:02:27
%S 0,1,0,2,0,2,0,3,0,2,0,4,0,5,0,2,0,2,0,2,0,2,0,2,0,2,0,2,0,1
%N Number of prime knots up to nine crossings with determinant 2n+1 and signature 2.
%C Adapted from Figure 6.6. The prime knots up to nine crossings separated by signature and determinant, p. 146, Cromwell. Second column of A172184.
%D Peter R. Cromwell, Knots and Links, Cambridge University Press, November 15, 2004.
%e a(1) = 1 because the only prime knot with determinant 2*1+1=3 and s=2 is 3_1, the left-handed trefoil.
%e a(3) = 2 because the only prime knots with determinant 2*3+1=7 and s=2 are 5_2 and 9_42.
%Y A002863, A172184, A172293.
%K nonn
%O 0,4
%A _Jonathan Vos Post_, Nov 20 2010
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