[tex]an = {n}^{2} + 2n - 1[/tex]
where
an is the nth term and
n is the number of terms.
To check if this is correct, try to find the third term which is already in the given sequence.
a3 = 14
a3 = 9^2 + 2(3) - 1
a3 = 9 + 6 - 1
a3 = 9 + 5
a3 = 14
14 = 14
Therefore, the general term is correct.