binomial sum bug

*To*: mathgroup at smc.vnet.net*Subject*: [mg82576] binomial sum bug*From*: "Jack Kennedy" <jack at realmode.com>*Date*: Thu, 25 Oct 2007 06:06:34 -0400 (EDT)

In: Sum[Binomial[5,2k],{k,0,5}] Out: 16 In: Sum[Binomial[n,2k],{k,0,n}] /. n->5 Out: -16 What the? This has been addressed before [mg70486] about a year ago and a work around was posted but I have two questions: 1. Was it declared a bug by Wolfrram, and 2. In general does Wolfram issue bug fixes, and specifically is there a patch for this problem? $Version = 5.1 for Microsoft Windows (October 25, 2004) Regards, Jack Kennedy