[seqfan] Re: Primes with n prime substrings

Robert G. Wilson v rgwv at rgwv.com
Wed Apr 7 14:50:41 CEST 2010


Charles,

    Where is the 7 in a(4)? That's why a(n)=2357.

Bob.

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From: "Charles Greathouse" <charles.greathouse at case.edu>
Sent: Wednesday, April 07, 2010 7:59 AM
To: "Sequence Fanatics Discussion list" <seqfan at list.seqfan.eu>
Subject: [seqfan] Re: Primes with n prime substrings

> Why 2,23,523,2357 and not 2,23,523,523?
>
> Charles Greathouse
> Analyst/Programmer
> Case Western Reserve University
>
> On Wed, Apr 7, 2010 at 4:11 AM, zak seidov <zakseidov at yahoo.com> wrote:
>> 2,23,523,2357,112573,511327,1135217,1113251719,11171323519,11113171952329,...
>>
>> a(n) = the smallest prime with at least n first primes as its substrings.
>>
>> Anyone may wish to check/extend/edit/submit this?
>>
>> Zak
>>
>>
>>
>>
>>
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