[seqfan] Mathematica's or my err?

zak seidov zakseidov at yahoo.com
Sat Apr 24 14:05:58 CEST 2010


Dear seqfans with Mathematica
(or other tools?!),
anyone may wish to check this strange result:

FullSimplify[Sum[(1/i)*Binomial[2n-i-1,i-1],{i,1,n}]] =
(2^(-1 - 2*n)*(-4^n + (1 + Sqrt[5])^(2*n)))/n

I use M 5.1.
Thanks, Zak


      




More information about the SeqFan mailing list