Quinhexar is equal to \(Q_{1,4}(6)\) in the Q-supersystem.[1] It's comparable to \(f_{\omega+4}(6)\) in the fast-growing hierarchy. The term was coined by Boboris02.

 Approximations

Notation Approximation
Fast-growing hierarchy \(f_{\omega+4}(6)\)
Hardy hierarchy \(H_{\omega^{\omega+4}}(6)\)
Chained arrow notation \(6\rightarrow 6\rightarrow 6\rightarrow 5\)
BEAF \(\{6,6,4,2\}\)
Hyperfactorial array notation \(6![5]\)
Strong array notation s(6,6,5,2)

Sources

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