Print a list but the list couldn't print the repeated value?

Question

like 2**1=2, 2**2=4, 2**3=8 .. 3**1=3, 3**2=9, 3**3=27 .. 4**1=4, 4**2=16, 4**3=64 .. the answers get stored in an array and print the answers but the repeated answers prints one time.
Like 2**2=4 also 4**1=4 ... so it prints one time.

Answer 1

Store the values in set structure. Set structure is and i quote "an unordered collection with no duplicate elements." -- Python documentation
https://code.sololearn.com/cXQgpj292qnt/?ref=app

Answer 2

I updated my answer with some code.

Answer 3

Sorry, need a code. I'm beginner.