# [seqfan] Re: Digits concatenation

Claudio Meller claudiomeller at gmail.com
Thu Nov 10 15:02:47 CET 2011

```HI Paolo, seqfans, I found this values:
without 0:

a(6)= 2346/51= 46, a(7)= 3426/571=6, a(8)= 3456/1728 = 2 a(9)= 13458/6729=2

with 0:

a(6)= 304/152=2, a(7)= 1046/523=2, a(8)= 10352/647=16, a(9)= 10476/5328=2

Best,

2011/11/10 Paolo Lava <paoloplava at gmail.com>

> Dear SeqFans,
>
>
>
> I am thinking to a sequence where at any step “n” we concatenate all the
> digits of all the natural numbers from 1 to n in order to build up two
> numbers x and y that minimize the ratio x/y, being x/y integer (leading
>
>
>
> Starting with a(1)=1 we have a(2)=2 because 2/1=2, a(3)=4 because 12/3=4,
> a(4)=33 because 132/4=33, a(5)=38 because 532/14=38, etc.
>
>
>
> If we start from a(0)=0 we have a(1)=0 (0/1), a(2)=5 (10/2), a(3)=34
> (102/3), a(4)=3 (102/34), etc.
>
>
>
> Is there anybody who is willing to compute additional terms?
>
>
>
> Thanks
>
>
>
> Paolo
>
> _______________________________________________
>
> Seqfan Mailing list - http://list.seqfan.eu/
>

--
Claudio Meller
http://grageasdefarmacia.blogspot.com
http://todoanagramas.blogspot.com/
http://simplementenumeros.blogspot.com/

```