Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
(20383222077370251*2^n+1)/10134668640983040*2^n+1)
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random