Tethradu-ennon

The tethradu-ennon is equal to E100(#^^#^(9))^^#^(9)100 in Extended Cascading-E Notation. The term was coined by Sbiis Saibian.
== Approximations in other notations ==
Notation 	Approximation
Bird's array notation 	\(\{100,9 [1 [2 \neg 2] 3] 2\}\)
Fast-growing hierarchy	\(f_{\varphi(9,1)}(100)\)
Hardy hierarchy 	\(H_{\varphi(9,1)}(100)\)
==Sources==
Category:Numbers
Category:Numbers by Sbiis Saibian
Category:Extended Cascading-E numbers
Category:Binary phi level