The following were calculated with various incarnations of my conjunction program.
These are geocentric conjunctions (run on a UNIX system in 2003).
These are geocentric conjunctions in celestial longitude (VAX version run around 1994).
These are three-planet conjunctions when the planets fit in the smallest circle.
Additional information is found in "Mutual Occultations of Planets: 1557-2230", Sky and Telescope, March 1979.