Write the First Four Terms of the Sequence Whose General $$a _ { n } = 2 ^ { n }$$

Write the first four terms of the sequence whose general term is given.
- $$a _ { n } = 2 ^ { n }$$

A) $1,2,4,8$
B) $1,4,9,16$
C) $2,4,8,16$
D) $4,8,16,32$