Work Step by Step
For every $n$, where $n\geq3$ there is an $a_n$ term of the sequence. $n$ is a natural number. Therefore there are infinite number of terms in this sequence.
You can help us out by revising, improving and updating this answer.Update this answer
After 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.