Trigintation

Trigintation refers to the function \(a \uparrow^{28} b\), where Arrow Notation is used.

Trigintation can be written in array notation as {a,b,28}, in chained arrow notation as \(a \rightarrow b \rightarrow 28\) and in Hyper-E notation as E(a)1#1#1#1...1#1#1#b (27 ones).

Trigintational growth rate is equivalent to \(f_{29}(n)\) in the fast-growing hierarchy.