[seqfan] Re: Strict divisors and digits of a(n)

Olivier Gerard olivier.gerard at gmail.com
Sun Dec 1 21:29:12 CET 2013


On Sun, Dec 1, 2013 at 9:20 PM, Eric Angelini <Eric.Angelini at kntv.be> wrote:


> Now consider S:
>  a(n) will _not_ be part of S if one digit
> of a(n) can be found in one of its SDs:
>
> S=2,3,4,5,6,7,8,9,23,27,29,34,38,...
>
>
> My (naive?) question is:
> -- Is S finite?
>
>

It is infinite if there is an infinity of primes not  having 1 in their
decimal representation.


Olivier


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