[seqfan] Re: Cumulative multiplication

David Wilson davidwwilson at comcast.net
Thu Apr 30 05:13:35 CEST 2015


What if you treat 0 as a 1 in the multiplication?

> -----Original Message-----
> From: SeqFan [mailto:seqfan-bounces at list.seqfan.eu] On Behalf Of David
> Wilson
> Sent: Wednesday, April 29, 2015 11:07 PM
> To: 'Sequence Fanatics Discussion list'
> Subject: [seqfan] Re: Cumulative multiplication
> 
> Yeah, well, I'd be surprised if you found any more...
> 
> > -----Original Message-----
> > From: SeqFan [mailto:seqfan-bounces at list.seqfan.eu] On Behalf Of M. F.
> > Hasler
> > Sent: Wednesday, April 29, 2015 10:12 AM
> > To: Sequence Fanatics Discussion list
> > Subject: [seqfan] Re: Cumulative multiplication
> >
> > Congratulations! Great work, Giovanni!
> > It is indeed nice when live surprises us -- provided it is a nice
> > surprise as this one... :D !
> > This came insofar more as a surprise, as I just had proposed this
> > sequence as
> > https://oeis.org/draft/A257275 maybe 15 minutes before you sent your
> > message.
> >
> > Wishing a very nice day to all SeqFans, Maximilian
> >
> >
> > On Wed, Apr 29, 2015 at 10:04 AM, Giovanni Resta <g.resta at iit.cnr.it>
> wrote:
> > > On 04/19/2015 05:15 AM, David Wilson wrote:
> > >>
> > >> I would be very surprised if we found any more good numbers.
> > >
> > >
> > > Isn't it nice when life surprises us ?
> > >
> > > 3682784876146817236992 = p(3682784876146817236992) * p(3682784876).
> > >
> > >
> > > (No other < 10^100. If we allow to multiply digits from both ends of
> > > the number, like in
> > > 4794391461888 = 8*8*8*(4*7*9*4*3*9*1*4*6*1*8*8*8)*4*7, then the
> > non
> > > trivial such numbers < 10^100 are 128, 175, 384, 735, 1296, 18432,
> > > 34992, 442368, 4128768, 13395375, 13436928, 161243136, 1269789696,
> > > 4161798144, 149824733184, 611784327168, 4794391461888,
> > > 2877833474998272, 3682784876146817236992.)
> > >
> > > Giovanni
> > >
> > >
> > >
> > > _______________________________________________
> > >
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> >
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> >
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> 
> 
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