I did some testing. This is the result: Max = maximum value of the resistor, InB = In Between. Pause = Pause to load the cap.
Code:
		Max	InB	Min	Min	InB	Max
Pause 3		46336	54273	16388	8965	48132	30980
Pauseus 5	39433	54025	11274	64777	11529	27145
It should be in the form of x² or -x². But both show strange behaviour.

Do you have an idea ?