The following is perhaps a standard question, but i could not find a plain enough answer by simply searching online.

Q: Given a knot $K$ and its $(p,q)$-cable $K_{p,q}$ what is a relation between the Vassiliev invariants of $K$ and $K_{p,q}$?

In particular, I would be happy with a formula for the 2nd coefficient of the Conway polynomial. (One may attempt to solve this via the A-polynomial since it has a simple relationship for satellites, however relating the resulting A-polynomial back to the Conway p. seems nontrivial, ... at least for me. Also it is seems likely that somebody could have already worked this out.)