3-white

N. J. A. Sloane njas at research.att.com
Thu Nov 11 17:18:03 CET 1999


A 3-White number is a number that you can cube, take the digits in blocks of
three, add them, and get the number back. I suppose you can generalize
n-White numbers with the nth power and in blocks of n digits.


> 45^2;
                                                     2025

> 55^2;
                                                     3025

> 99^2;
                                                     9801

> 297^3;
                                                   26198073

> 1296^3;
                                                  2176782336

> 14443^4;
                                              43514063882862001

so how does 26198073 give 297 ?

NJAS





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