Initial masses of embryos against their initial semi-major axes for the oligarchic initial condition. The red points are embryos in a 0.5 Myr disk, green points are in a 1 Myr disk, blue points are in a 2 Myr disk, and black points are in a 3 Myr disk. Different point shapes represent different separation between adjacent embryos. Squares depict embryos separated by 10 R_Hill from each other, triangles are embryos with spacing of 7 R_Hill and rhombuses are embryos with spacing of 5 R_Hill. The comparison of different spacing between embryos is only plotted for the 0.5 Myr disk.