In each of the following number series, a wrong number is given. Find out that number.
8.5, 18, 55, 231, 1106, 6637
1
55
2
1106
3
18
4
231
5
6637
In each of the following number series, a wrong number is given. Find out that number.
8.5, 18, 55, 231, 1106, 6637