OFFSET
0,2
COMMENTS
The denominator is a parameterization of the Alexander polynomial for the knot 6_3. 1/(1-3*x+5*x^2-3*x^3+x^4) is the image of the g.f. of A057083 under the modified Chebyshev transform A(x)->(1/(1+x^2)^2)A(x/(1+x^2)).
LINKS
Dror Bar-Natan, The Rolfsen Knot Table
Index entries for linear recurrences with constant coefficients, signature (3,-5,3,-1).
FORMULA
MATHEMATICA
LinearRecurrence[{3, -5, 3, -1}, {1, 3, 4, 0, -13}, 40] (* Harvey P. Dale, Oct 07 2017 *)
CROSSREFS
KEYWORD
easy,sign
AUTHOR
Paul Barry, Oct 16 2004
STATUS
approved