[seqfan] Re: A175723: Why not monotonic and why repetitions?
klaus-brockhaus at t-online.de
Wed Aug 18 23:10:39 CEST 2010
Shouldn't the name of A054775 be "POSITIVE multiples ..." unless zero is
prepended? And shouldn't the repetitions be removed? The sequence
without repetitions is not in the OEIS.
What are "the same properties" that "Mr. S. M. Ellerstein's sequence
does indeed make use of"?
Miller, Shao schrieb:
> -----Original Message-----
> From: Richard Mathar [mailto:mathar at strw.leidenuniv.nl]
> zz> %S A175723 24,36,36,48,54,66,78,90,120,144,144,168,84,96,120,132,186
> zz> %N A175723 These are multiples of 6 without surrounding twin primes.
> zz> %C A175723 Why not monotonic and why repetitions?
> Should probably called a duplicate of A054775 .....
> Alternative is to call it an "obsc" and to leave it there.
> -----Response Message-----
> Thank goodness for sequence fans with such familiarity. I didn't come
> across A054775; 10 years older than this public offering. It would
> appear that Mr. S. M. Ellerstein's sequence does indeed make use of the
> same properties.
More information about the SeqFan