Answer
$a_n = n^2/3^n$
Work Step by Step
The numerator is always a square number from which we can deduce $n^2$
The denominator can be found to be $3^n$ since the denominator is always a power of 3.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.