[seqfan] Re: A200000
Vladimir Shevelev
shevelev at bgu.ac.il
Tue Nov 22 01:29:59 CET 2011
Thanks for your question, Jonathan!
It is the following sequence containing exactly 8 terms for which nontrivially a(1)=200000:
200000, 2600000, 35000000, 35200000, 500000000, 502600000, 535000000, 535200000.
Name: List of numbers n without 1's in decimal such that n is equal to the number of 1's in the decimal digits of all positive numbers < n.
Thus, if it is A200000, then for the writing all the previous sequences we use exactly 200000 1's!
It is the first number in the set of 8 unique numbers among all positive integers!!
CROSSREF: A014778
Best regards,
Vladimir
----- Original Message -----
From: Jonathan Post <jvospost3 at gmail.com>
Date: Tuesday, November 15, 2011 10:08
Subject: [seqfan] Re: A200000
To: Sequence Fanatics Discussion list <seqfan at list.seqfan.eu>
> The cited seq "List of numbers n such that n is equal to the
> number of
> 1's in the decimal digits of all numbers <= n." is pretty, albeit
> arbitrarily in Base 10. Is there any seq for which
> nontrivially a(1)
> or a(0) = 200000?
>
> On Mon, Nov 14, 2011 at 8:55 AM, Vladimir Shevelev
> <shevelev at bgu.ac.il> wrote:
> > I suggest to reserve A200000 for the most interesting
> sequence among sequences containing 200000 (and not only among them!)
> >
> > In my opinion, it is a beautiful finite sequence A014778 by
> Yv. Babe, M. Protat and Ol. Gerard.
> >
> > Regards,
> > Vladimir
> >
> > ----- Original Message -----
> > From: "N. J. A. Sloane" <njas at research.att.com>
> > Date: Monday, November 14, 2011 3:35
> > Subject: [seqfan] A200000
> > To: seqfan at seqfan.eu
> > Cc: jaroslav.krizek at atlas.cz, njas at research.att.com,
> crgreathouse at gmail.com>
> >>
> >> Dear Seqfans,
> >> On the Future Projects page on the OEIS wiki,
> >> Charles Greathouse suggested that we reserve A200000
> >> for an especially interesting sequence. Something really
> >> special. Any suggestions?
> >> (We can renumber any recent sequence to A200000, of course.)
> >> Neil
> >>
> >> PS A200000 had been reserved by Jaroslav Krizek. I have
> >> written to him asking if he would be willing to give it up.
> >>
> >> _______________________________________________
> >>
> >> Seqfan Mailing list - http://list.seqfan.eu/
> >>
> >
> > Shevelev Vladimir
> >
> > _______________________________________________
> >
> > Seqfan Mailing list - http://list.seqfan.eu/
> >
>
> _______________________________________________
>
> Seqfan Mailing list - http://list.seqfan.eu/
>
Shevelev Vladimir
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