# [seqfan] Re: Help for knives (and huge computer time)!

Robert G. Wilson v rgwv at rgwv.com
Fri Jun 27 07:13:37 CEST 2014

Neil,

Look at the draft of A084229.

I am extending the sequence. Right now I have 30000, but will let my machine crunch over night. Looking for at least 100000.

I suspect that for each possible value which A084229 can take, there is a maximum index.

Bob.

-----Original Message-----
From: SeqFan [mailto:seqfan-bounces at list.seqfan.eu] On Behalf Of Neil Sloane
Sent: Thursday, June 26, 2014 1:23 PM
To: Sequence Fanatics Discussion list
Subject: [seqfan] Re: Help for knives (and huge computer time)!

I see that Jason K. added a comment to A243357:

Apart from numbers containing the digit zero, the first numbers that cannot appear as terms are 14, 18, 34, 38, 54, 58,... -Giovanni Resta, Jun 25 2014

The excluded terms listed by Resta are double A084229(3..8) = 7, 9, 17, 19, 27, 29. - Jason Kimberley, Jun 25 2014

This seems fairly unlikely, and would be remarkable if true. Here is the definition of A084229: Let b(1)=1, b(2)=2, b(n) = sum of digits of b(1)+b(2)+b(3)+...+b(n-1), sequence gives values of n such that b(n)=3.

Giovanni, would it be possible to find more terms in the "excluded"
sequence? In fact it should probably have an entry of its own - could you create it?

Best regards
Neil

On Thu, Jun 26, 2014 at 4:44 AM, Giovanni Resta <g.resta at iit.cnr.it> wrote:

> On 06/26/2014 12:44 AM, Neil Sloane wrote:
>
>> Giovanni, Thanks for the new b-file!
>>
>> Interesting graph.
>>
>> Is there a way to put your 10^6 terms on the OEIS web site?
>>
>
> It seems a large file for OEIS. I've added a link to one of my
> websites, where I stored the file.
>
>
> Giovanni
>
>
>
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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.