[seqfan] Re: Question

[Trizen]

Hi David,

The first few Carmichael numbers with this property are: 3240392401,
13577445505, 14446721521, 84127131361, 203340265921, 241420757761,
334797586201, 381334973041, 461912170321. (Cf. A002997)

Regards,
Daniel

On Mon, Jun 3, 2019 at 7:32 PM David Sycamore via SeqFan <
seqfan at list.seqfan.eu> wrote:

> Dear Seqfans,
>
> Consider the sequence:
>
> “Odd square-free composite numbers divisible by the sum of their prime
> divisors” (subsequence of A046347, but not yet in oeis):
>
> 105, 231, 627, 805, 897, 1581, 2967, 3055, 4543, 5487, 6461, 6745, 7881,
> 10707, 14231, 15015....
>
> I have data up to 5*10^6.
>
> Does anyone know if a Carmichael number could have this property? If so it
> should show up at some point in this sequence, but I found none so far. Any
> comment?
>
> Regards,
>
> David.
>
>
>
>
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>