Find the First Five Terms of the Sequence Defined by the Given

Find the first five terms of the sequence defined by the given general term.
- $$a _ { n } = n ^ { 2 } - n$$

A) $1,4,9,16,25$
B) $2,6,12,20,30$
C) $0,2,6,12,20$
D) $0,3,8,15,24$