What are the first three values for the following recursive sequence?

Question

$a_0 = 3$

$a_n = (a_{n-1})^2 + (a_{n-2})^2 +\cdots + (a_0)^2$ for all integers $n\geq 1$.

Would that mean $a_1 = a_0^2 = 9$?

Thanks!