RATS Sequences

Initializing live version
Download to Desktop

Requires a Wolfram Notebook System

Interact on desktop, mobile and cloud with the free Wolfram Player or other Wolfram Language products.

Take a number, reverse its digits, add that to the original, and then sort the digits. Repeating this produces what is known as a RATS sequence (Reverse Add Then Sort). John Conway conjectured that such a sequence eventually cycles or becomes a divergent period-two pattern.

Contributed by: Rob Morris (March 2011)
Open content licensed under CC BY-NC-SA




Feedback (field required)
Email (field required) Name
Occupation Organization
Note: Your message & contact information may be shared with the author of any specific Demonstration for which you give feedback.