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.
正の項の PG: a_2 = 6 、 a_5 = 162 。各項。
正の項の PG: a_2 = 6 、 a_5 = 162 。各項。
Natural Language
Math Input
Extended Keyboard