Find a formula for the general term an\displaystyle {a}_{{n}} of the sequence assuming the pattern of the first few terms continues.

{8,12,16,20,24,}\displaystyle {\left\lbrace{8},{12},{16},{20},{24},\ldots\right\rbrace}

Assume the first term is a1\displaystyle {a}_{{1}}

an\displaystyle {a}_{{n}} =