  The Alexander polynomials \Delta_{n,3}(t) and \Delta_{n,4}(t) are presented
as a sum of the Alexander polynomials \Delta_{k,2}(t). These polynomials are
also expressed in the form of a sum of Chebyshev polynomials of the second
kind. These expansions allow one to introduce the "coordinates" in
corresponding bases, which are proposed to be the numerical invariants
characterizing links and knots.
