[seqfan] Re: Sets of composite numbers

[Neil Sloane]

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

Which is why we are here - please add it!


On Mon, Jul 28, 2014 at 10:17 AM, Allan Wechsler <acwacw at gmail.com> wrote:

> 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,...
> >
> >
> > _______________________________________________
> >
> > Seqfan Mailing list - http://list.seqfan.eu/
> >
>
> _______________________________________________
>
> Seqfan Mailing list - http://list.seqfan.eu/
>



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Neil J. A. Sloane, President, OEIS Foundation
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