Re: HoldForm and Sum

*To*: mathgroup at smc.vnet.net*Subject*: [mg121782] Re: HoldForm and Sum*From*: Alan <alan.isaac at gmail.com>*Date*: Sun, 2 Oct 2011 02:35:30 -0400 (EDT)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*References*: <j66e8v$hbs$1@smc.vnet.net>*Reply-to*: comp.soft-sys.math.mathematica at googlegroups.com

You can get the terms you want as Sum[(HoldForm[#1] &)[(-1)^Quotient[i - 1, 3]/i], {i, 1, 12}] I don't know how to keep them in the order you want. Alan Isaac