In Response To 'Re: Re: Finding coefficients of'
"I guess I was just hoping there was some way to do it without then having to subtract n in my head afterwards."
I'm deeply confused now.
You have something like
and I thought you wanted to get
so I suggested you multiply by x^2
(my wording was bad and was missing a minus)
and that gives you
and use Coefficientlist on that and get
which is what I thought you were asking for.
If you can explain what I have misunderstood or provide a precise specification then perhaps I can figure out what I've done wrong and try to find a solution.