WOLFRAM|DEMONSTRATIONS PROJECT

n-Digitaddition

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starting number
power
1
2
3
4
5
6
7
8
9
10
length
numbers
list plot
graph plot
starting number = 93
Start with a number, say 39. Add its digits (
3+9=12
) 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
2
3
+
2
9
=9+81=90
, and so on.