計算機數學

For the following problems, please solve the linear recurrence relation $a_n - 4a_{n-1} + 4a_{n-2} = 2^n$ with $a_0 = 1$ and $a_1 = 2$, and let the solution be in the form $a_n = (i + jn + kn^2) \cdot 2^n$.

(4分) $i = ?$