# [seqfan] Re: Quick and fun permutation

Eric Angelini Eric.Angelini at kntv.be
Tue Sep 30 00:10:15 CEST 2014

```Yes, well done, Maximilian -- thanks
for the submission!
Best,
É.
Catapulté de mon aPhone

> Le 30 sept. 2014 à 00:06, "M. F. Hasler" <oeis at hasler.fr> a écrit :
>
> Dear Eric,
> I get slightly different data after "30").
> Proposed as https://oeis.org/draft/A248024
>
> M.
> (PARI)
> {a(n,S=1,u=2)=for(i=1,n,print1(S",");for(k=1,9e9,bittest(u,k)&&next;S%digits(k)[1]&&next;u+=1<<S=k;break));S}
>
> 1, 10, 2, 11, 12, 3, 13, 14, 7, 15, 5, 16, 4, 17, 18, 6, 19, 100, 20,
> 21, 30, 22, 23, 101, 102, 24, 8, 25, 50, 26,...
>
>> On Mon, Sep 29, 2014 at 10:29 AM, Eric Angelini <Eric.Angelini at kntv.be> wrote:
>> Hello SeqFans,
>>
>> Start S with a(1) = 1
>> Extend S with the smallest integer not yet present
>> whose leftmost digit divides a(n). I get (by hand,
>> in a couple of seconds):
>>
>> S = 1,10,2,11,12,3,13,14,7,15,5,16,4,17,18,6,19,100,20,21,30,31,101,102,22,23,103,104,8,24,25,50,26,27,9,33,...
>
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>
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```