IF 1=2, 2 = 10, 3 = 30, 4=68 Then 5 =?

IF 1=2, 2 = 10, 3 = 30, 4=68 Then 5 =?

1=2

2=10

3=30

4=68

Then 5 = ?

Answer: 130
Explanation:
1=(1x1x1)+1=2
2=(2x2x2)+2=10
1=(3x3x3)+3=30
4=(4x4x4)+4=68
5=(5x5x5)+5=130