3, 6, 9, 12, 15
11, 22, 33, 44, 55
1, 4, 7, 10, 13
0.5, 1.0, 1.5, 2.0, 2.5
3, 5, 7, 9, 11
3, 5, 9, 17, 33
1.0, 1.5, 2.0, 2.5, 3.0
5, 10, 15, 20, 25
6, 13, 20, 27, 34
7, 14, 21, 28, 35
7n
3n -2
7n -1
2n +1
(n+1) / 2
0.5n
(2^n) +1
11n
5n
3n
