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.
prod[n=2,infty] (1 - 2/(n^2+n))
prod[n=2,infty] (1 - 2/(n^2+n))
Natural Language
Math Input
Extended Keyboard
