Fibonacci & Resistor Network

Found Fibonacci relation with Resistor network from mathworld.
At n=4, I think "1 ohm" should be in the possible resistance list as it is one of combination of 4 '1ohm' resistors.
Therefore n=4,5.. will have 9, 18.. possible resistances.

 fibonacci number 1,2,3,5.....

n=3 , 4 possible value

n=4, 9 possible value

n=6, 18 possible value