Generate Mathematical Series Using Factorial and Power in Power Query

[nuance]

This may sounds like a dumb math question but I am kind of stuck at generating the following series on the right using the left column in power query, anyone can help? thanks a lot in advance!

1	0
2	0.5
3	0.75
4	0.875
5	0.9375

[nuance · Accepted solution]

turns out i just key in the number series into google and found the solution...

https://socratic.org/questions/is-this-sequence-arithmetic-or-geometric/