Problem in Math Day

Wrong answer is coming for 2 test cases.
Please help me through this!

We’ll run our loop from 1 to n-1 instead of 1 to n.
Please have a look at this code here

I hope I’ve cleared your doubt. I ask you to please rate your experience here
Your feedback is very important. It helps us improve our platform and hence provide you
the learning experience you deserve.

On the off chance, you still have some questions or not find the answers satisfactory, you may reopen
the doubt.