  Recently, in arXiv:1105.2298 [hep-th], we have estimated the energy radiated
in the head-on collision of two equal D-dimensional Aichelburg-Sexl shock
waves, for even D, by solving perturbatively, to first order, the Einstein
equations in the future of the collision. Here, we report on the solution for
the odd D case. After finding the wave forms, we extract the estimated radiated
energy for D=5,7,9 and 11 and unveil a remarkably simple pattern, given the
complexity of the framework: (for all D) the estimated fraction of radiated
energy matches the analytic expression 1/2-1/D, within the numerical error
(less than 0.1%). Both this fit and the apparent horizon bound converge to 1/2
as D goes to infinity.
