Revision history [back]
 | 1 | initial version |
It is not clear to me what you mean by "giving an expression for the n-th coefficient". Is this what you are looking for?
sage: R.<z> = FractionField(QQ[['z']])
sage: R
Laurent Series Ring in z over Rational Field
sage: (z^-2 + z^3 + 5*z^8 + O(z^10)).integral()
-z^-1 + 1/4*z^4 + 5/9*z^9 + O(z^11)
