A Matter of Scale

I want to go with a logarithmic scaling for attributes, a bit like the stats in Blood of Heroes or the Speed/Distance table in GURPS. Annoyingly, this necessitates adding a table to my game (the bane of immersive RPGs!) but I think it might be okay, being really the only table that's part of the game mechanics.

I think I'll set it so that +2 to an attribute represents a doubling of its value, and an odd-numbered attribute is 1.4 times the value of the even-numbered attribute before it. So...

Attr..Val
8.......5
9.......7
10.....10
11.....14
12.....20
13.....28
14.....40
15.....56
16.....80

...That's the basic idea, assuming I center the attributes on 10.