ABACABA pattern

The ABACABA pattern is a recursive fractal pattern that shows up in many places in the real world (such as in geometry, art, music, poetry, number systems, literature and higher dimensions).

[1][2][3][4] Patterns often show a DABACABA type subset.

AA, ABBA, and ABAABA type forms are also considered.

[5] In order to generate the next sequence, first take the previous pattern, add the next letter from the alphabet, and then repeat the previous pattern.

[4] ABACABA is a "quickly growing word", often described as chiastic or "symmetrically organized around a central axis" (see: Chiastic structure and Χ).