Answer
$a_{1}=4$,
$a_{2}=14$,
$a_{3}=34$,
$a_{4}=74$,
$a_{5}=154$
Work Step by Step
$a_{1}=4$,
$a_{2}=2(4+3)=14$,
$a_{3}=2(14+3)=34$,
$a_{4}=2(34+3)=74$,
$a_{5}=2(74+3)=154$
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