A bit more detail: I am generating a list of all 3-color combination from a list of colors (say 10, but can increase/decrease). I am generating triangles with these combinations, where each side has one of the 3 colors.
I want to tile a flat surface with these 3-color triangles, but I also want sides that are adjacent (from two neighboring triangles) to share the same color. And, finally, each combination should be repeated just once over the surface. I am also happy to hear a solution that doesn't depend on colors/geometry but numbers of course. I just don't know how to phrase it that way.
You're looking for MacMahon triangles.