Ackermann Blocks
For example, when the piles are [2, 1, 1, 1], that represents A(2, A(1, A(1, 1))).
The default settings show A(3, 1) reducing to 13.
About the Ackermann Function
Space : Step P : Play/Pause R : Restart
<= : Slower => : Faster
Space : Step P : Play/Pause R : Restart
<= : Slower => : Faster