Chapter 11 - Section 11.1 - Sequences - 11.1 Exercises - Page 735: 5

$6,11,20,37,70$

$a_{n}=2^{n}+n$ for $n\geq 2$. Rewrite the formula: $a_n=2^{n+1}+n+1$ for $n\geq 1$. Substitute $1,2,3,4,5$ to $n$: $a_{1}=2^{2}+2=6$ $a_{2}=2^{3}+3=11$ $a_{3}=2^{4}+4=20$ $a_{4}=2^{5}+5=37$ $a_{5}=2^{6}+6=70$