The septasexa-sexahexar is equal to \(Q_{4,0}(6)=Q_{3,6}(6)\) in the Q-supersystem.[1] The term was coined by Boboris02.

Approximations

Notation Approximation
Fast-growing hierarchy \(f_{\omega 4}(6)\)
Hardy hierarchy \(H_{\omega^{\omega 4}}(6)\)
Slow-growing hierarchy \(g_{\varphi(3,5,0)}(6)\)
Chained arrow notation \(6\rightarrow 6\rightarrow 6\rightarrow 6\rightarrow 6\rightarrow 7\)
BEAF \(\{6,6,6,4\}\)
Hyperfactorial array notation \(6![1,4]\)
Notation Array Notation \((6\{3,6\}7)\)

Sources

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