[seqfan] Re: Integers formed by concatenating primes
Michael Porter
ic_designer at verizon.net
Fri Oct 16 08:13:20 CEST 2009
Seems like a good suggestion. But the single-base version might be useful as well.
I have a newbie question: how does a potential author (me) determine if a sequence is "important enough" to include in the database? Are there guidelines? Has a sequence ever been deleted because it's uninteresting or spam-like?
Most of the sequences I've thought of are already in the database, and I haven't found any that I could say are worthless, so whatever we're doing is working....
Michael Porter
--- On Thu, 10/15/09, Jonathan Post <jvospost3 at gmail.com> wrote:
From: Jonathan Post <jvospost3 at gmail.com>
Subject: [seqfan] Re: re Integers formed by concatenating primes
To: "Sequence Fanatics Discussion list" <seqfan at list.seqfan.eu>
Date: Thursday, October 15, 2009, 7:59 AM
Rather than 1-at-a-time debasification (acid that neutralizes bases?),
I usually suggest giving the main diagonal of the array, and showing
the array, of such a seq parameterized by base k, with row 2 being the
binary seq, row 10 being the decimal seq, and so forth.
On Thu, Oct 15, 2009 at 7:39 AM, Leroy Quet <q1qq2qqq3qqqq at yahoo.com> wrote:
> Is the base 2 version in the EIS? I have not checked. What about this sequence with other bases (3,4,5,6, etc)?
>
> In general, I suggest, someone should add all the base-2 missing 'base' sequences that already exist in the database as base 10 versions (submitted by Eric Angelini and others), and submit base 10 versions of 'base' sequences that involve base 2 (submitted by me and others).
> And of course, someone could calculate and submit the base 3, base 4, base 5, etc versions of both the base 10 and the base 2 sequences, if these sequences do not already exist in the database.
> :)
>
> Thanks,
> Leroy Quet
>
>
> [ ( [ ([( [ ( ([[o0Oo0Ooo0Oo(0)oO0ooO0oO0o]]) ) ] )]) ] ) ]
>
>
> --- On Thu, 10/15/09, Eric Angelini <Eric.Angelini at kntv.be> wrote:
>
>> From: Eric Angelini <Eric.Angelini at kntv.be>
>> Subject: [seqfan] Re: re Integers formed by concatenating primes
>> To: "Sequence Fanatics Discussion list" <seqfan at list.seqfan.eu>
>> Date: Thursday, October 15, 2009, 12:23 PM
>>
>> Thanks, Neil -- sorry for the missing 31,
>> Best,
>> É.
>>
>>
>>
>> -----Message d'origine-----
>> De : seqfan-bounces at list.seqfan.eu
>> [mailto:seqfan-bounces at list.seqfan.eu]
>> De la part de N. J. A. Sloane
>> Envoyé : jeudi 15 octobre 2009 13:26
>> À : seqfan at seqfan.eu
>> Objet : [seqfan] re Integers formed by concatenating
>> primes
>>
>>
>> >this seq seems absent from the OEIS:
>>
>> S =
>> 2,3,5,7,11,13,17,19,22,23,25,27,29,32,33,35,37,41,43,47,52,53,55,57,59,61,67,71,72,73,75,77,
>> 79,83,89,97,101,103,107,109,112,...
>>
>>
>> Me; You left out 31, I think? but it is still
>> missing and I will add it
>>
>> Neil
>>
>>
>
>
>
>
>
>
>
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>
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