John D. answered 11/07/15
Tutor
4.9
(100)
Visual Basic, Microsoft Office, Databases, General Computing
The 20th term is 117 and the sum of the first 20 terms is 1,200.
3,9,15,21,27,33,39,45,51,57,63,69,75,81,87,93,99,105,111,117