1-(n/6)((5/6)^(n-1)+(2/3)^(n-1)+(1/2)^(n-1)+(1/3)^(n-1)+(1/6)^(n-1)) = 1-n*((2/27)*(25/27)^(n-1)+(5/27)*(20/27)^(n-1)+(13/54)*(1/2)^(n-1)+(13/54)*(7/27)^(n-1)+(5/27)*(2/27)^(n-1))

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.