[seqfan] Re: Rif: Re: Insert "+" and always get a prime
Hans Havermann
gladhobo at teksavvy.com
Wed Dec 24 20:02:29 CET 2014
David Wilson:
> I take it that internal zeroes are not allowed, e.g. 400044049 doesn't pass muster?
I've just discovered that allowing the internal zeros probably makes for a better sequence and that Giovanni Resta already charted them (under the name "magnanimous"):
http://www.numbersaplenty.com/set/magnanimous_number/
Giovanni, you did not include 20, 101, 1001. Presumably no others.
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