Core radius (heavy black line) and Lagrangian radii containing 90%, 80%, 70%, 60%, 50%, 40%, 30%, 20%, 10%, 5%, and 3% (dashed lines from top to bottom) of the total mass. The half mass radius is indicated by a heavier dashed line. The initial condition was a King model with W₀ = 6 containing 6144 stars. A Scalo mass function with mass limits m_lower = 0.1   M_⊙ and m_upper = 100   M_⊙ was chosen as the initial mass function. Core collapse is reached at t_cc ≃ 20.6 N-body time units or t_cc ≃ 0.21t_rlx, which is the time of formation of the first hard binary.