I am going to run the computations for the use of Jupiter and Saturn along with the Sun for Oberth Maneuvers. The escape velocities of these two gas giant planets is very close to that from the Sun at the Earth and Venus radial coordinates. I was wondering if anyone could provide the formulations for compound Oberth Maneuvers where the Sun, then Jupiter then Saturn would be utilized. I assume closest approaches to the Sun equal to that of Earth, Venus, and Mercury orbits. I am assuming that accelerations as high as 2 to 4 Earth g's can be tolerated such as required for Oberth Maneuvers using Jupiter and Saturn. Note that I am working on very large mass ratio chemical rocket assumptions and high impulse nuclear thermal rockets. I assume that Delta v for each of the above three bodies can be as high as 250 km/second or higher. For chemical rockets, I assume extreme specific impulses such as those perhaps obtained by theoretical chemical reactants. Note that I had no problem running the numbers maneuvers using the Sun for sun centered radial coordinates for closest approaches equal to that of Earth, Venus, and Mercury orbits.