Keith Numbers
Library Home 
Full Table of Contents 
Suggest a Link 
Library Help
http://users.aol.com/s6sj7gt/mikekeit.htm  


Mike Keith  
A Keith number is an ndigit integer N with the following property: If a Fibonaccilike sequence (in which each term in the sequence is the sum of the n previous terms) is formed, with the first n terms being the decimal digits of the number N, then N itself occurs as a term in the sequence. Keith numbers are all known up to 10^19. Can you find the next one? A recreational mathematics problem related to recurrent sequences and Diophantine equations.  


Levels:  College 
Languages:  English 
Math Topics:  Number Theory 
[Privacy Policy] [Terms of Use]
© 1994 The Math Forum at NCTM. All rights reserved.
http://mathforum.org/