No information is lost by dropping the terminal 1s. Thus we may write the following form.
The article referenced below tells how forms like these correspond to a family of digraphs called riffs and a family of graphs called rotes. The riff and rote for are shown in the next two displays.
cc: Conceptual Graphs • Cybernetics • Laws of Form • Mathstodon • Ontolog
cc: FB | Riffs and Rotes • SeqFan • Structural Modeling • Systems Science