[seqfan] Re: Multiples of 3 ending with n

Ignacio Larrosa Cañestro ilarrosa at mundo-r.com
Sat May 23 10:57:29 CEST 2015


El 23/05/2015 a las 10:46, Reinhard Zumkeller escribió:
> cf.  https://oeis.org/A258083
> Best regards
> Reinhard


And  a(n) = mod(-n, 3)*10^(1 + floor(log(n)/log(10)) + n ?

> 2015-05-23 10:33 GMT+02:00 Eric Angelini <Eric.Angelini at kntv.be>:
>
>> Sorry for the wrong terms -- it was
>> too early this morning (but you caught
>> the idea).
>>
>> In a similar way, we could put "n"
>> in front and ask for the smallest
>> next term divisible by, say, 7;
>>
>> T = 14,21,35,42,56,63,70,84,91,105,...
>> Best,
>> É.
>>
>>
>>> Le 23 mai 2015 à 10:15, Ignacio Larrosa Cañestro <ilarrosa at mundo-r.com>
>> a écrit :
>>>> El 23/05/2015 a las 10:12, Reinhard Zumkeller escribió:
>>>> isn't a(6) = 6, != 36 ?
>>>> best, R.
>>> And a(9) = 9, != 39   ...
>>>> 2015-05-23 7:39 GMT+02:00 Eric Angelini <Eric.Angelini at kntv.be>:
>>>>
>>>>> Hello SeqFans,
>>>>> a(n) is the smallest multiple of 3 (not
>>>>> yet present in S) that ends with "n".
>>>>>
>>>>> S =
>>>>>
>> 21,12,3,24,15,36,27,18,39,210,111,312,213,114,315,216,117,318,219,120,...
>>>>> Best,
>>>>> É.
>>>>>
>>>>> _______________________________________________
>>>>>
>>>>> Seqfan Mailing list - http://list.seqfan.eu/
>>>> _______________________________________________
>>>>
>>>> Seqfan Mailing list - http://list.seqfan.eu/
>>>
>>> --
>>> Saludos,
>>>
>>> Ignacio Larrosa Cañestro
>>> A Coruña (España)
>>> ilarrosa at mundo-r.com
>>> http://www.xente.mundo-r.com/ilarrosa/GeoGebra/
>>>
>>>
>>> _______________________________________________
>>>
>>> Seqfan Mailing list - http://list.seqfan.eu/
>> _______________________________________________
>>
>> Seqfan Mailing list - http://list.seqfan.eu/
>>
> _______________________________________________
>
> Seqfan Mailing list - http://list.seqfan.eu/


-- 
Saludos,

Ignacio Larrosa Cañestro
A Coruña (España)
ilarrosa at mundo-r.com
http://www.xente.mundo-r.com/ilarrosa/GeoGebra/



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