Wave based spawn system

Hi. i am trying to make a wave based spawn system, beginning with 3 enemies and increasing by 2 each round after they are all killed. i am not very good at blueprinting, so any help/hints on how to set this up is appreciated.

To get the proper number to apawn your going to want to take the wave number and multiply it by 2 then add 3. This will give you the total number of enemies to spawn which you can then feed into a forloop as the last index.