Regulating auto fill-in function

Hey, thanks a lot for the reply.
You are right, I'm indeed Italian, with an Italian language excel version.

In any case, I followed your advice and attached a file.
In the array B3, C3, D3 there is the proper matrix formula. In the following three rows (B,C,D4; B,C,D5; B,C,D6) I added manually the correct updated formulas so it should be easy to understand what pattern I'm trying to create for those three columns.

I've no idea how to achieve that, any help would be just great!
Bye
Fra