The trimentri is equal to \( \lbrace 3,3 (0,0,0,1) 2 brace = \lbrace 3,3 ((1) 1) 2 brace \) in BEAF. The term was coined by Jonathan Bowers. It can be thought as: * 3-superdimensional array of 3's * 1-trimensional array of 3's * "3 tetrated to 3" array of 3's * "3 pentated to 2" array of 3's. Trimentri is comparable to \(f_{\varepsilon_0}(5)\) in the fast-growing hierarchy.