[seqfan] Re: Ali Sada's A364054

[Neil Sloane]

PS  I just saw that in the meantime, Chai Wah Wu has extended my A366470,
which gives a(n) mod p(n)
(I mean, A364054(n) mod prime(n)), and it has a really lovely graph.  It
looks like a series of count-downs,
breaking up the sequence into "chapters"

Best regards
Neil

Neil J. A. Sloane, Chairman, OEIS Foundation.
Also Visiting Scientist, Math. Dept., Rutgers University,
Email: njasloane at gmail.com



On Mon, Oct 23, 2023 at 11:50 PM Neil Sloane <njasloane at gmail.com> wrote:

> Don,  Those notes are very nice!  I have been doing essentially the same
> thing, although you are way ahead of me.  Will try to catch up.
>
> Michael Branicky has also been looking at the sequence. Earlier today he
> sent me an email saying:
> (start quote)
> 5 does not appear in the first 3.33 billion terms.
> Below are the terms with a(m) < 100 for m > 100 up to that point.
>
> FOUND n     a(n)  time to find
>
> ---------------------------------------
>
> FOUND 147 93 0.0002129077911376953
>
> FOUND 149 89 0.0002617835998535156
>
> FOUND 153 53 0.0002739429473876953
>
> FOUND 155 49 0.0002808570861816406
>
> ...
>
> FOUND 28146 75 0.06493282318115234
>
> FOUND 28149 7 0.06496000289916992
>
> FOUND 53557 96 0.1294858455657959
>
> FOUND 53559 60 0.1295149326324463
>
> FOUND 53562 46 0.12952780723571777
>
> FOUND 334122 90 0.907620906829834
>
> FOUND 1716631 68 5.161136865615845
>
> FOUND 10430380 72 35.21131873130798
>
> FOUND 10430382 66 35.211352825164795
>
> FOUND 189472347 99 730.0188508033752
>
> FOUND 1353331587 59 6077.564160823822
>
> (end quote)
>
> My present guess is that 5 will eventually appear.  But my opinion may
> change after I've digested your notes.
>
> Best regards
> Neil
>
> Neil J. A. Sloane, Chairman, OEIS Foundation.
> Also Visiting Scientist, Math. Dept., Rutgers University,
> Email: njasloane at gmail.com
>
>
>
> On Mon, Oct 23, 2023 at 11:06 PM Don Reble via SeqFan <
> seqfan at list.seqfan.eu> wrote:
>
>>
>> > It would be nice to have more...
>>
>>      http://www.graysage.com/djr/A364054.pdf
>>
>> --
>> Don Reble  djr at nk.ca
>>
>> --
>> Seqfan Mailing list - http://list.seqfan.eu/
>>
>