Calculate the Planetary Orbital Radius in AU using Titius - Bode Law

The Calculator calculates the Planetary Orbital Radius for given index of planet. The actual radius of the planets is calculated based on the index of the planets. Titius states the spacing of the planets in the solar system in this law. Bode predicted that there would be another planet based on the planetary orbital radius calculation.
Formula: DAU = (4+3 * 2n ) / 10
Where, DAU = Planetary Orbital Radius, n = Index Of Planet
Index Of Planet: 
Planetary Orbital Radius:  AU