I am sure this is very basic, and I think I have done it before but how do I take a base number, say 3 and then depending on the number of another number the result should be increasing by double for every number. So it should increase like 3 , 6 , 12 , 24 , 48 , 96 etc
So for example if the other value is 3 then the value should be 12, if it is 5 the value should be 48.
How do I do this with a formula?