The ultatri is equal to {3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3} (twenty-seven 3's) = {3,27 (1) 2} in BEAF, or 27 & 3 using the array of operator. The term was coined by Jonathan Bowers. Ultatri is comparable to \(f_{\omega^{25}}(3)\) in the fast-growing hierarchy.
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