(2^floor[9/2]*((1-floor[floor[9/2]-9/2])27*35^floor[9/2]+35*(3^floor[9/2]+floor[floor[9/2]-9/2]+2)))/(70*(3*floor[floor[9/2]-9/2]+4))-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.