Definition:Hyperoperation/Nth Hyperoperation

Definition
Let $\left\langle{H_n}\right\rangle$ denote the hyperoperation sequence.

The $n$th term of $\left\langle{H_n}\right\rangle$, which is the binary operation $H_n : \Z_{\ge 0} \times \Z_{\ge 0} \to \Z_{\ge 0}$, is known as the $n$th hyperoperation.

Also see

 * Definition:Ackermann Function
 * Definition:Ackermann-Péter Function