u Calculate e

描述
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.
输出
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.
样例
样例输出 #1
n e
- -----------
0 1
1 2
2 2.5
3 2.666666667
4 2.708333333
来源
Greater New York 2000
HDOJ-1012
题目来源:HDOJ-1012
时间限制:1000 MS
内存限制:32768 KB
Java 类名:Main
64 位整数占位符:%I64d