[seqfan] Re: Dead b-files for A127816 and others

franktaw at netscape.net franktaw at netscape.net
Thu Jul 23 21:47:20 CEST 2009

Actually, "such that 3^k mod k == n" is a bit ambiguous.  If we write 
"such that 3^k == n (mod k)", we clearly are not implying that k > n.  
On the other hand, "such that mod(3^k,k) == n" (or better, "such that 
mod(3^k,k) = n"), we clearly are implying this.  With the form Joerg 
suggested, it isn't clear if "mod" is an operator, or if this is just a 
slightly odd way of stating a congruence.

Franklin T. Adams-Watters

-----Original Message-----
From: Max Alekseyev <maxale at gmail.com>

On Thu, Jul 23, 2009 at 12:39 AM, Joerg Arndt<arndt at jjj.de> wrote:
> In A078457 and similar seqs, shouldn't we shorten
>  "... such that the remainder when 3^k is divided by k is n."
> by
>  "... such that 3^k mod k == n."
> Makes it way better readable IMHO.

These definitions are slightly different. The former implies that k>n,
while the latter does not.

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