Tettro

Tettro is equal to s(4,4,3) in strong array notation.Numbers from linear array notation | Steps Toward Infinity! The term was coined by Wikia user Hyp cos. It can be represented in up-arrow notation as \(4\uparrow\uparrow\uparrow4\) (4 pentated to 4). It is approximately 10↑↑10↑↑1010154.
This number is also equal to s(4,2,4) and s(4,3,1,2).
==Etymology==
The name of this number is based on the word "tetra" and "tri" (Greek for 4 and 3), meaning a base-4 number, generated using hyper-3 operation based on exponentiation.
==Computation==
Tettro can be computed in the following process:
*\(f(1)=4\)
*\(f(2)=4^4=256\)
*\(f(3)=4^{4^4}\approx1.3408\times10^{154}\)
*\(f(4)=4^{4^{4^4}}\), a.k.a. tetbo
*etc.
*Tettro equals \(f(f(f(4)))\).
==Approximations==
==See also==
==Sources==
Category:Numbers
Category:Up-arrow notation level
Category:Numbers by Hyp cos
Category:3 entry linear
Category:Powers of 2
Category:Pentation
Category:Strong array notation numbers