What is the number 2002 of 0,3,8,15,24

What is the number 2002 of 0,3,8,15,24

First find the law, get the general formula, and then replace the N in it with 2002
0,3,8,15,24,.
Add one to each number and you get
1,4,9,16,25,……
It's exactly n ^ 2
So the general term formula of the original sequence is an = n ^ 2-1
So the number 2002 is: 2002 ^ 2-1 = 400800