How to find the residue of   {e^(az)}/z(z+b)^m   at the pole -b of order m

I am facing the problem below

                 i have a sequence q_n: n=0 to ∞

                 another sequence is defined as p_n=q_{n-1 ,} n=1 to ∞

                  ...

I have obtained the taylor series expansion of a function and got the coefficients as numbers.

I want to assign those coefficients to a variable.

I need your help.

@Markiyan Hirnyk 

Dear sir i have worked with the command

>plot(log(-1+exp(t)),t=0..2*Pi);

i got plot.

When i replced the argument by complex variable t ->i*θ

i got the same message.

Warning, unable to evaluate the function to numeric values in the region; see the plotting command's help page...

how to plot log(-1+e^t) t=0..2*Pi