[seqfan] Re: Sets of composite numbers

Allan Wechsler acwacw at gmail.com
Mon Jul 28 16:17:55 CEST 2014


I would not have considered 1 to be composite; but 10 *is* composite. With
these modifications, D' = 4,8,8,24,24 ... and OEIS has it at A030296.

With the same modifications, C' = 4,9,10,27,28 ... and this, as far as I
can tell, is *not* in OEIS.


On Mon, Jul 28, 2014 at 10:04 AM, Eric Angelini <Eric.Angelini at kntv.be>
wrote:

> Sorry:  D = 1,9,16,27,28,95...
>
> > Hello SeqFans,
> the 1st column is "n", the number of elements of the set; the 2nd column
> is the smallest set of "n" consecutive composites.
>
> 1____1
> 2____8,9
> 3____14,15,16
> 4____24,25,26,27
> 5____24,25,26,27,28
> 6____90,91,92,93,94,95
> ...
>
> If I'm not wrong, the seq C = 1,8,14,24,24,90,... is not in the OEIS.
> And if C is of interest, why not D = 1,9,16,28,95,...
>
>
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