5n-9
3n-1
2n
2n-1
2n-6
3n-3
4n+3
n-15
-14, -13, -12, -11...
0, 3, 6, 9...
-4, 1, 6, 11...
7, 11, 15, 19...
-4, -2, 0, 2...
1, 3, 5, 7...
2, 4, 6, 8...
2, 5, 8, 11...
