The decadumel[1] is equal to 10[[10]] in copy notation.

How to get this numberEdit

To get a1, just write "10".

To get a2, write "10" a1 times. It will be 10101010101010101010, or decamel.

To get an, write "10" an-1 times.

Then, a10 is the decadumel.

Notation Approximation
Up-arrow notation \((10\uparrow)^9 20\)
Fast-growing hierarchy \(f_{3}(12)\)
Hardy hierarchy \(H_{\omega^3}(12)\)
Slow-growing hierarchy \(g_{\epsilon_0}(10)\)

See alsoEdit