Bode's Rule

Start with the sequence 0, 3. Then, double the 3,  giving the sequence 0, 3, 6. Continue doubling until you reach 384.
 
 

0 3 6 12 24 48 96 192 384

Add 4 to each number.
 
 

4 7 10 16 28 52 100 196 388

Divide each number by 10.
 
 

0.4 0.7 1.0 1.6 2.8 5.2 10.0 19.6 38.8

Now compare this sequence with the actual distance in AU for the planets.
 
 

Body Actual Distance Bode's Rule
Mercury 0.39 0.4
Venus 0.72 0.7
Earth 1.0 1.0
Mars 1.52 1.6
Asteroid Belt 2 to 3 2.8
Jupiter 5.2 5.2
Saturn 9.54 10.0
Uranus 19.2 19.6
Neptune 30.1
Pluto 39.4 38.8