if that doesnt help, start your loop with 10 and look at the result. i think you'll see why the way you use setw here is not right.
(btw setw(0) and setw(1) behave the same).
and just three advices, you dont need { } around the cout<<"\n";, you forgot an "int" in front of main
and i think you want to use Loop-- (in the for-loop) and Loop = Space-1 to decrease Loop by two every step?
Just use Loop-=2 in the for-loop. so you can save a line of code. ;-)