Graham-Conway number

The Graham-Conway number is an erroneous version of Graham's number from Conway and Guy's book The Book of Numbers, which is larger than the actual Graham's number. Using up-arrow notation, it is defined as:
\begin{eqnarray*}
gc(1) &=& 4 \uparrow\uparrow\uparrow\uparrow 4 \\
gc(k + 1) &=& 4 \underbrace{\uparrow\uparrow\uparrow\cdots\uparrow\uparrow\uparrow}_{gc(k) \text{ arrows}} 4 \\
gc(64) &=& \text{Graham-Conway number}
\end{eqnarray*}
It can be represented as \(\{4,65,1,2\}\) in BEAF.
It is exactly \(\ [4,4,4,64]\) in the Graham Array Notation.
==Approximations==
==Sources==
==See also==
*Little Graham
*Graham's number
*Conway's Tetratri
* Conway's Tetratet
de:Graham-Conway-Zahl
ja:グラハム・コンウェイ数
Category:Numbers
Category:Eponymous numbers
Category:Powers of 2
Category:Linear omega level