Write the first five terms of the sequences whose nth term is an = 2n

$a_{n}=2^{n}$

Substituting n = 1, 2, 3, 4, 5, we obtain

$a_{1}=2^{1}=2$

$a_{2}=2^{2}=4$

$a_{3}=2^{3}=8$

$a_{4}=2^{4}=16$

$a_{5}=2^{5}=32$

Therefore, the required terms are $2,4,8,16$, and 32 .