# n-Digitaddition

n-Digitaddition

Start with a number, say 39. Add its digits () and repeat. This process, called digitaddition, quickly produces fixed points. An extension to this idea, called n-digitaddition, raises each digit to a power before adding them together. For instance, the 2-digitaddition sequence of 39 is , and so on.

3+9=12

3+9=9+81=90

2

2