Program to print number with star pattern

We have to print the pattern as given in the below example.
Examples :
 

Input : 5
Output :
 1
 1*2
1*2*3
 1*2
 1

Input : 9
Output :
 1
 1*2
 1*2*3
 1*2*3*4
1*2*3*4*5
 1*2*3*4
 1*2*3
 1*2
 1

Output: 

 1
 1*2
1*2*3
 1*2
 1

Time Complexity: O(n²), where n represents the given input.
Auxiliary Space: O(1), no extra space is required, so it is a constant.