  We study scattering of higher spin closed string states at arbitrary mass
levels from D-particle in the Regge regime. We extract the infinite ratios
among high-energy amplitudes of different string states in the fixed angle
regime from these Regge string scattering amplitudes. In this calculation, we
have used an identity proved recently based on a signless Stirling number
identity in combinatorial theory. The complete ratios calculated by this
indirect method include a subset of ratios calculated previously by direct
fixed angle calculation. Moreover, we discover that in spite of the
non-factorizability of the closed string D-particle scattering amplitudes, the
complete ratios derived for the fixed angle regime are found to be factorized.
These ratios are consistent with the decoupling of high-energy zero norm states
calculated previously.
