## Intermediate Algebra for College Students (7th Edition)

$a_n=n^2$; $n=1,2,3,4,...$
Since, we have $1,4,9,16...$ or, $1,2^2,3^2,4^2,........$ Here, $n=1,2,3,4,...$ which can be represented as: $a_n=n^2$; $n=1,2,3,4,...$