(sum n=1 to infinity n/((3^n)-1))-(((pi^2)/(6*((ln(3))^2)))-(1/(2*ln(3)))+(1/24))

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.