Numerical plaindromes and the 196 Problem (Essays in Memory of the Late Satoshi Okuda, Lecturer at Osaka University of Economics)
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The numbers 727,1991,38483 and so on, are the same when read forwards or backwards. These numbers are known as numerical plaindromes. Let's pick an arbitrary number, recorded the digits in reverse and add it to the original number. It is said that repeating this operation eventurally leads to a plaindrome. Numbers in the sequence derived from 196 however, do not yield a plaindrome. This is an unresolved mathematical problem.
- 大阪経済大学の論文
- 2010-05-15
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