[seqfan] Re: A000120(n)=A000120(n*b) and A000120(b)=A000120(n*b)

israel at math.ubc.ca israel at math.ubc.ca
Wed Dec 30 19:23:00 CET 2020


Oh, actually it's A292849.  I don't know why I didn't see that: I thought
I searched for it.

On Dec 30 2020, Hugo Pfoertner wrote:

>Seems to be the first 20 terms of A115873.
>
>On Wed, Dec 30, 2020 at 5:55 PM <israel at math.ubc.ca> wrote:
>
>> Yes, certainly there could be some interesting sequences here.
>> Please do submit some.
>> Along these lines, you might consider a(n) the least x
>> such that A000120(n*x) = A000120(x).  This sequence starts
>> 1, 1, 3, 1, 7, 3, 7, 1, 15, 7, 3, 3, 5, 7, 15, 1, 31, 15, 7, 7.
>> Of course, all terms are odd.  Does it contain every odd number?
>>
>> Cheers,
>> Robert
>>
>
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>



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