Your numbers are incresing with 2 Multiply 2 by 36
36 x 2 =72 the 36th term is number 72
If your numbers are increasing with 5, for example, and you want to know 11th term you should multiply 5 with 11
5×11 = 55
The prouve: 5 (1st), 10 (2nd), 15 (3rd), 20 (4th), 25(5th), 30 (6th), 35 (7th), 40 (8th), 45 (9th), 50 (10th), 55 (11th)