Category:Rare Numbers
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This category contains results about Rare Numbers.
Definitions specific to this category can be found in Definitions/Rare Numbers.
A rare number is a non-palindromic integer $n$ which has the property that $n + r$ and $n - r$ are both square, where $r$ is the reversal of $n$.
Pages in category "Rare Numbers"
The following 2 pages are in this category, out of 2 total.