Coefficients of a series in Maple I have been using 
seq(coeff(series( f(x), x, n+1), x, n), n = 0 .. 40);

to obtain the coefficients of series expansions. It seems efficient enough until some comparisons are made with other platforms.
For example: the script 
seq(coeff(series(1/mul(1-x^j, j = 1 .. 11), x, n+1), x, n), n = 0 .. 70);

takes 0.134 seconds to calculate in Maple but the same script in Mathematica 
CoefficientList[Series[1/Product[1 - x^j, {j, 1, 11}], {x, 0, 70}], x]

takes 0.00739489 seconds. Pari has a similar fast calculation time. 
The question becomes: Is there a faster, or more efficient, method to calculate the coefficients of a series? 

S:= series(1/mul(1-x^j,j=1..11),x,71):
seq(coeff(S,x,j),j=0..70);

took 0.031 seconds in Maple 2019 on my computer.  YMMV. 
