u Calculate e

Background

A simple mathematical formula for e is

where n is allowed to go to infinity. This can actually yield very accurate approximations of e using relatively small values of n.

Output

Output the approximations of e generated by the above formula for the values of n from 0 to 9. The beginning of your output should appear similar to that shown below.

Example

Output

n e


0 1
1 2
2 2.5
3 2.666666667
4 2.708333333

http://blog.csdn.net/huayunhualuo/article/details/46565705

the above formula for the values of n from 0 to 9. The beginning of your output should appear similar to that shown