Numberjacks
3 (Three), 4 (Four), 5 (Five) and 6 (Six) are the main characters and are the ones that solve the problems, either going out into the real world or staying and monitoring things at the base. In the past, 4 has turned into a symmetrical 4, a 5, a 6 and a 14, 3 once turned into a 4, and 6 once turned into 2 3s.