Please solve the programming task below using a self-contained code snippet in a markdown code block.

Your music player contains n different songs. You want to listen to goal songs (not necessarily different) during your trip. To avoid boredom, you will create a playlist so that:

Every song is played at least once.
A song can only be played again only if k other songs have been played.

Given n, goal, and k, return the number of possible playlists that you can create. Since the answer can be very large, return it modulo 109 + 7.
 
Please complete the following python code precisely:
```python
class Solution:
    def numMusicPlaylists(self, n: int, goal: int, k: int) -> int:
```