Find the power series representation for $$f(x) = \int_{0}^{x} \dfrac{\tan^{-1}t}{t} \; dt.$$

$$f(x) = \sum_{n=1}^{\infty} (-1)^{e_{n}} \, a_{n} x^{p_{n}},$$ where $e_{n} =$

A. n - 1
B. n
C. 0

and $a_{n} =$ ,

and $p_{n} =$ .