[seqfan] Re: Primes with n prime substrings
zak seidov
zakseidov at yahoo.com
Wed Apr 7 16:24:54 CEST 2010
Bob,
thanks for pointing this A054260!
But I bet I checked 2,23,523,2357 and one of two OEIS's gave no match(?!)
Still I was sure that "my" sequence should be in some form in OEIS -
and that's why I didn't submit it.
May be "at least n" and " exactly n" may make difference?
Anyone may wish to do this (not me anyway :-))
Thanks to all responding,
Zak
----- Original Message ----
From: Robert G. Wilson v <rgwv at rgwv.com>
To: Sequence Fanatics Discussion list <seqfan at list.seqfan.eu>; seqfaneu <seqfan at seqfan.eu>
Sent: Wed, April 7, 2010 2:54:28 PM
Subject: [seqfan] Re: Primes with n prime substrings
Zak,
How does this sequence differ from A054260: "Smallest prime that
contains all of the first n primes as substrings." ?
http://www.research.att.com/~njas/sequences/A054260
Bob.
--------------------------------------------------
From: "zak seidov" <zakseidov at yahoo.com>
Sent: Wednesday, April 07, 2010 8:34 AM
To: "seqfaneu" <seqfan at seqfan.eu>
Subject: [seqfan] Re: Primes with n prime substrings
> But a(4)=523 has no '7' (4th prime) as substring(?)
> Zak
>
>
>
>
> ----- Original Message ----
> From: Charles Greathouse <charles.greathouse at case.edu>
> To: Sequence Fanatics Discussion list <seqfan at list.seqfan.eu>
> Sent: Wed, April 7, 2010 1:59:54 PM
> 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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