Hi @SkepticTank and welcome to Codewars! Good luck debugging this kata - just to say that the f before quotation marks thing is an example of a Python f-string (f for format/formatting).

You can learn more about them by Googling "Python f string" you'll find sites like this: https://realpython.com/python-f-strings/

(Not an endorsement of the site, just the first decent result that popped up).

Run following code in your VS:

print(f"For n=3, my solution returns {row_sum_odd_numbers(3)}")

and see what happens.

Your solution has a bug, it;s not a kata issue.