2,3,5,9,( ),( )怎么写?

问题描述:

2,3,5,9,( ),( )怎么写?

应该有如下规律:
2 = 1 + 2^0
3 = 1 + 2^1
5 = 1 + 2^2
9 = 1 + 2^3
= 1 + 2^4
所以 ()应该是 17