Answer
$5, 6, 7, 8, 9$
Work Step by Step
Let's evaluate $a_1, a_2, a_3, a_4, $and $a_5$ by plugging in $1, 2, 3, 4, $ and $5$ for each $n$.
$a_1 = 1+4 = 5$
$a_2 = 2+4 = 6$
$a_3 = 3+4 = 7$
$a_4 = 4+4 = 8$
$a_5 = 5+4 = 9$
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