A (different) rep question

Ok I'm just womndering how much rep do you need let's say to get 2 blocks, 3 blocks, 4block, ect.
Does anyone know?
2 = 120?
3 = 180?
4 = 240?

Is that right by 60's? I don't know.

2=100
3=200
4=300
5=400
6=500

and so on...