* n = 1: 3(1) + 1 = 4
* n = 2: 3(2) + 1 = 7
* n = 3: 3(3) + 1 = 10
* n = 4: 3(4) + 1 = 13
* n = 5: 3(5) + 1 = 16
The first five terms are 4, 7, 10, 13, 16.