Column[Table[{x , ((1+1*floor(1.8^x))/4)/(1/4+(1+1*x)*10) //N}, {x,1,20}]]

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.