Exp Curve Formula Help

[rechronicle]

Hello!
How to write this formula for the Exp curve, I'm using Yanfly plugin.
Lv1 to 2 - need 100
Lv2 to 3 - need 200
Lv3 to 4 - need 300
and so on...

I'm not really good at math, I can't figure this out after trying for some time.
Please help, thanks!

 

[AfroKat]

Use "100 x actor's level" for the formula. so every level it's 100 for 1, 500 for 5, 2000 for 20 and so on.

 

[rechronicle]

Tried that, and it's actually the default from the plugin. It's resulting in:
Lv1 to Lv2 - need 100
Lv2 to Lv3 - need 100
Lv3 to Lv4 - need 100
and so on...

How do I say this, it's not gradually increasing.