You left out two critical details.
- There are quotes around the "1:3"
- This is an array formula entered with CTRL-SHIFT-ENTER (it works very different that formulas entered with just "enter").
These are essential details that you want to be sure not to leave it. It changes the nature of the question entirely!
When asking questions, try not to oversimplify it to the extent that it does not make sense, or we cannot tell what you are trying to do.
Post
#6 is how your original question should have been posted, as it contains all the pertinent details.