Octintar

Octintar is equal to \(\underbrace{Tar(\cdots (Tar)\cdots)}_{8\quad pairs \quad of \quad brackets}=f_{\underbrace{C(C(\cdots(C(C(\Omega_{Septintar2,0),0),\cdots ),0)}_{Septintar\quad C's}}(Septintar)\)

the term was coined by Denis Maksudov.