Knot[8, 21] -> {204.78125, {72 + t^(-8) - 10/t^6 + 33/t^4 - 60/t^2 - 60*t^2 + 
    33*t^4 - 10*t^6 + t^8, 2670 + t^(-14) + 4/t^12 - 60/t^10 + 276/t^8 - 
    775/t^6 + 1550/t^4 - 2331/t^2 - 2331*t^2 + 1550*t^4 - 775*t^6 + 276*t^8 - 
    60*t^10 + 4*t^12 + t^14}}
