# [seqfan] Re: Reciprocal Recaman

Neil Sloane njasloane at gmail.com
Sat Nov 16 03:06:59 CET 2013

```Oops! The denominators are A231693...

On Fri, Nov 15, 2013 at 7:34 PM, <franktaw at netscape.net> wrote:

> I would be surprised if they are.
>
>
>
> -----Original Message-----
> From: David Wilson <davidwwilson at comcast.net>
> To: 'Sequence Fanatics Discussion list' <seqfan at list.seqfan.eu>
> Sent: Fri, Nov 15, 2013 6:04 pm
> Subject: [seqfan] Re: Reciprocal Recaman
>
>
> Do we know for sure that the denominators are A002805?
>
>  -----Original Message-----
>> From: SeqFan [mailto:seqfan-bounces at list.seqfan.eu] On Behalf Of Neil
>> Sloane
>> Sent: Friday, November 15, 2013 5:57 AM
>> To: Sequence Fanatics Discussion list
>> Subject: [seqfan] Re: Reciprocal Recaman
>>
>> I added the numerators of f(n) as A231692. The denominators are
>>
> A002805.
>
>> I also added this to the Index to Fractions on the Wiki side.
>> Perhaps someone else (Don?) could add Don's sequence.
>> Neil
>>
>>
>> On Fri, Nov 15, 2013 at 4:51 AM, Don Reble <djr at nk.ca> wrote:
>>
>> > f(0) = 0
>> >> f(n) = f(n-1) - 1/n if >= 0, else f(n-1) + 1/n.
>> >>
>> >> For which n do we have f(n-2) > f(n-1) > f(n)?
>> >>
>> >
>> >    I get
>> >
>> >    3 6 13 34 91 264 783 2342 7013 21030 63079 189236 567709 1703124
>> >    5109367 15328088 45984249
>> >
>> >    Since odds and evens alternate, I conclude that no term is triple
>> >    the previous.
>> >
>> > --
>> > Don Reble  djr at nk.ca
>> >
>> >
>> >
>> > _______________________________________________
>> >
>> > Seqfan Mailing list - http://list.seqfan.eu/
>> >
>>
>>
>>
>> --
>> Dear Friends, I have now retired from AT&T. New coordinates:
>>
>> Neil J. A. Sloane, President, OEIS Foundation
>> 11 South Adelaide Avenue, Highland Park, NJ 08904, USA.
>> Also Visiting Scientist, Math. Dept., Rutgers University, Piscataway,
>>
> NJ.
>
>> Email: njasloane at gmail.com
>>
>> _______________________________________________
>>
>> Seqfan Mailing list - http://list.seqfan.eu/
>>
>
>
> _______________________________________________
>
> Seqfan Mailing list - http://list.seqfan.eu/
>
>
> _______________________________________________
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--
Dear Friends, I have now retired from AT&T. New coordinates:

Neil J. A. Sloane, President, OEIS Foundation
11 South Adelaide Avenue, Highland Park, NJ 08904, USA.
Also Visiting Scientist, Math. Dept., Rutgers University, Piscataway, NJ.