6, 12, 18, 24
8, 15, 22, 29
7, 10, 13, 16
-5, -2, 1, 4, 7
-2, 3, 8, 13, 18
7, 14, 21, 28
4, 6, 8, 10
7n + 1
2n + 2
7n
3n - 8
6n
5n - 7
3n + 4
