I'm trying to converting an infinite series from several terms to sigma form.
The series in question is:
I've attached the worksheet 1.mw.
The example below works but not for the above I just get:
Error, invalid arguments to coeffs
Not sure where I'm going wrong any idea how to do this?
EXAMPLE that works from https://math.stackexchange.com/questions/2786296/strategy-or-software-for-representing-infinite-series-in-sigma-form
I've also attached the worksheet for this 2.mw
Coeffs:= [seq(coeff(S, x, j), j=0..10)];
convert(g, FPS, x);
rec:= gfun:-listtorec(Coeffs, a(n));
results in the same desired result.