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End row of numbers - 1

#### Problem

Given a natural number

`N`

. Write a program that calculates the first

`N`

factors of the following expression:

\(P = {2 \over 3}\cdot{4 \over 5}\cdot{6 \over 7}\ cdot ... \cdot {{2 \cdot N} \over {2\cdot N +1}}\)

**Input**
The input is a natural number

`N`

.

**Imprint**
Output the answer to the problem

##### Examples

# |
Input |
Output |

1 |
42 |
0.135542 |