$$a _ { n } = 8 n + 2$$
$n=\frac{a_{n}-2}{8}$
$$8n+2=a_{n}$$
$$8n=a_{n}-2$$
$$\frac{8n}{8}=\frac{a_{n}-2}{8}$$
$$n=\frac{a_{n}-2}{8}$$
$$n=\frac{a_{n}}{8}-\frac{1}{4}$$
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$a_{n}=8n+2$
