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.
table sum_k=2^n binom(n,k)*binom(k!,2) for n = 2 to 8
table sum_k=2^n binom(n,k)*binom(k!,2) for n = 2 to 8
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
