## Precalculus: Mathematics for Calculus, 7th Edition

$a_{1}=1$, $a_{2}=3$, $a_{3}=7$, $a_{4}=15$, $a_{5}=31$
$a_{1}=1$, $.\qquad a_{n}=2a_{m-1}+1$ $a_{2}=2(1)+1=3$ $a_{3}=2(3)+1=7$ $a_{4}=2(7)+1=15$ $a_{5}=2(15)+1=31$