Help calculating all the possible combinations with a 2-way outcome (odd / even)

Hello,

Long story short, I has the dumb and don't have any Excel skills either, however I'd like to know how can I find out all possible combinations of 20 events with a 2-way outcome (odds or even). Basically everything from all 20 events being odd to all 20 even and everything in between.

I'll attach a very simple spreadsheet to make things clearer. Thanks in advance !