Pentatri

Pentatri is equal to {3,3,3,3,3} or {3,5 (1) 2} (3 powergigoexploded to 3) in BEAF. or 5 & 3, using the array of operator. The term was coined by Jonathan Bowers.
It is also quite close to the lower bound for \( G(16) \) in the Goodstein function, which illustrates that large numbers can appear in the modern mathematics.
Chris Bird noted that Friedman's n(k) function is comparable to {3,k (1) 2}, so pentatri should be in ballpark with n(5).
===Etymology===
The name of this number is based on the words "penta-" (greek: five) and "tri-" (greek: three), meaning that there are 5 3's in the array.
=== Approximations in other notations ===
=== Sources ===
=== See also ===
ja:ペンタトリ
Category:Numbers
Category:Numbers by Jonathan Bowers
Category:Quadratic omega level
Category:5+ linear
Category:Greek-based name
Category:BEAF
Category:Powers of 3