Memoization in Recursive Functions in Python

Question

I posted a snippet about memoization in my code depository.
https://code.sololearn.com/chc8vBcm75U4/?ref=app
In order to solve two of the code coach solutions, I had to resolve to using memoization. Even though this was explained to me in school, I did not grasp it that well. But the code coach challenges really helped me understand it so much better.
I would appreciate if you take a look at my understanding and let me know if it makes sense or if some of my logic is incorrect.
I also want to translate it in Spanish if it makes sense.

Answer 1

Ivan In my opinion you can use as easily array/list where index/subscript+1 acts as "n"