[seqfan] Re: Orderly Numbers
T. D. Noe
noe at sspectra.com
Fri Oct 30 17:12:30 CET 2009
At 9:05 AM -0700 10/30/09, Andrew Weimholt wrote:
>On Fri, Oct 30, 2009 at 8:34 AM, Alonso Del Arte
><alonso.delarte at gmail.com> wrote:
>> A potentially dumb question, but: how do you choose the k for each n? Are
>> there "orderly" numbers with only one choice for k and others with lots of
>Yes, some orderly numbers have only 1 choice of k, and some have more.
>For example, for n=8, k can only be 5, but for n=71, k can be 3, 23, or 69.
>Or search for k is limited to tau(n) < k < n-1.
For composite orderly numbers n, it appears that k can be taken to be
tau(n)+1, tau(n)+3, or tau(n)+4. Not sure why.
More information about the SeqFan