If $a_0$ is known, then $\{a_1, a_2, \ldots \}$ is uniquely determined

If $a_n$ is known for any single $n$, then $a_0, a_1, \ldots, a_{n-1}$ and $a_{n+1}, a_{n+2}, \ldots$ are uniquely determined

Both A and B are true

Neither A nor B is true; we always need two consecutive terms