[seqfan] Re: A051264 == A050278 ?
moshe.levin at mail.ru
Mon Jan 9 18:03:54 CET 2012
A203987 allocated for Moshe Levin
Number of integers m such that both m and n*m are pandigital numbers (A050278).
3265920, 184320, 5820, 6480, 46080, 998, 387, 171, 167
09 января 2012, 16:53 от David Wilson <davidwwilson at comcast.net>:
> I think your "exactly" interpretation is the correct one, otherwise
> A051264 would coincide numerically with either A050278 or A171102 in the
> OEIS, which it does not starting at its first term. I would not expect
> such a mistake from the author.
> Given the "exactly" interpretation, the MathWorld claim that there
> exists a k-persistent number exists for each k becomes interesting and
> begs both a proof and an OEIS sequence of the smallest k-persistent
> number for each k.
> On 1/9/2012 3:22 AM, franktaw at netscape.net wrote:
> > From the definitions, A051264 should be the same as A171102, not A050278.
> > However, it appears that n-persistent is being used in a slightly
> > different way from what the MathWorld article defines. It seems that
> > it is being used to mean that the number is n-persistent as defined
> > but not (n+1)-persistent - one could perhaps call this exactly
> > n-persistent. Based on that, A051264 is different from the other two
> > sequences.
> > Certainly the definitions need to be clarified. The other sequences
> > referenced in the MathWorld article also appear to be defined in this
> > manner.
> > Franklin T. Adams-Watters
> > -----Original Message-----
> > From: Moshe Levin <moshe.levin at mail.ru>
> > Shouldn't A051264 (1 - persistent numbers)
> > coincide with A050278 (Pandigital numbers)?
> > My friend wrote to the author (of both seqs), in vail,
> > and asked me.
> > I think that A051264 == A050278 by definition.
> > Thanks,
> > ML
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