Question 810815
3,5  +2
5,9  +4
9,17 +8
17,33 +16
33,?  
There seams to be a pattern here.
The rule look like 2x-1  
2(3)-1=5
2(5)-1=9
2(9)-1=17
2(17)-1=33
2(33)-1=x
65 is the next number.