Which will be the next number in the sequence: 1, 2, 5, 12, 29, ??

Answer 1

2 + ( 1 + 2 ) = 5
5 + ( 5 + 2 ) = 12
12 + ( 12 + 5 ) = 29
29 + ( 29 + 12 ) = 70
70 + ( 70 + 29 ) = 169
and so on