On a certain numerical invariant of link types. (English) Zbl 0137.17903
Keywords:
topologyOnline Encyclopedia of Integer Sequences:
a(n) is the number of prime knots with n crossings such that the empirical unknotting numbers cannot be decided minimals using their signatures.Triangle read by rows: T(n,k) is the number of prime knots with n crossings whose unknotting numbers are k.
Irregular triangle read by rows: T(n,k) is the number of prime knots with n crossings whose signatures are k in absolute value.
Number of prime knots with n crossings whose unknotting numbers are given by their signatures.
References:
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