[seqfan] Re: Add "touching" digits of "n"

[Neil Sloane]

To start the ball rolling, I will create A236402 and A236403
- numbers with that property, and those without


On Thu, Jan 30, 2014 at 9:24 AM, Charles Greathouse <
charles.greathouse at case.edu> wrote:

> This sequence has density 1, since all numbers except a thin fraction have
> digits 0 through 18 in base 100. In particular, there are at most x^0.99782
> non-members up to x for large enough x. No doubt this can be improved.
>
> Charles Greathouse
> Analyst/Programmer
> Case Western Reserve University
>
>
> On Thu, Jan 30, 2014 at 9:02 AM, Eric Angelini <Eric.Angelini at kntv.be
> >wrote:
>
> > Hello SeqFans,
> > I think integers like those should deserve a seq.:
> >
> > 80, 107, 910, 1102, 1459, 41358, ...
> >
> > When you add two "touching" digits of "n", the result
> > is visible in "n".
> >
> > Example:
> > 80 --> 8+0=8
> > 107 --> 1+0=1  /  0+7=7
> > 910 --> 9+1=10  /  1+0=1
> > 1037 --> 1+0=1  /  0+3=3  /  3+7=10
> > 1459 --> 1+4=5  /  4+5=9  /  5+9=14
> > 41358 --> 4+1=5  /  1+3=4  /  3+5=8  /  5+8=13
> >
> > Best,
> > É.
> >
> >
> >
> >
> > _______________________________________________
> >
> > Seqfan Mailing list - http://list.seqfan.eu/
> >
>
> _______________________________________________
>
> 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.
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