[Last Visible Dog]

The function outputs n+1 gaps and not 2n when you put in n fossils.

Wrong.

The function outputs (n+2)-1 gaps

[VadeRetro]

The function outputs (n+2)-1 gaps

Now you're showing your math ignorance. Functions don't output complex expressions. Complex expressions go in. Single values go out.

You are incompetent to discuss this.

[WildTurkey]

The function outputs n+1 gaps and not 2n when you put in n fossils.

Wrong.

The function outputs (n+2)-1 gaps

er, (n+2)-1 EQUALS (n+1)