Rare numbers: Difference between revisions

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Shyam Sunder Gupta's URL seemed to have changed it's spelling from xxxxxxxxx.htm --> xxxxxxxx.html
m (→‎The task: added "%10" where needed. Without it, the progam fails to produce a result where "n+r" has the first digit of "1".)
m (Shyam Sunder Gupta's URL seemed to have changed it's spelling from xxxxxxxxx.htm --> xxxxxxxx.html)
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:*   an   OEIS   entry:   [http://oeis.org/A059755 A059755   odd rare numbers].
:*   planetmath entry:   [https://www.planetmath.org/RareNumbers rare numbers].     (some hints)
:*   author's  website:   [http://www.shyamsundergupta.com/rare.htmhtml rare numbers]   by Shyam Sunder Gupta.     (lots of hints and some observations).
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