request for advice

[Joerg Arndt]

* Hugo Pfoertner <all at abouthugo.de> [Mar 11. 2006 19:04]:
> Joerg Arndt wrote:
> >
> [...] 
> > 
> > Random try:
> > id:A101000 should die (Numbers n such that (820*10^n + 71)/9 is a prime)
> > id:A101001 should die
> > ...
> > id:A101010 should die (Numbers n such that (860*10^n - 23)/9 is prime)
> > seems to go on forever.
> > Stuff like that _kills_ the OEIS.
> > One of those seqs and a link to the rest is enough!
> 
> Please don't be too rigorous ;-)
> 
> I made another random try:
> 
> http://www.research.att.com/~njas/sequences/A041800
> 
> and then continue with "Adjacent sequences" in either direction. All to
> die? You probably know "Quod licet Iovi ...."
> 
> Hugo Pfoertner

Yep, I may have gone a little overboard here...
Thinking again:  I see two ways a sequence can be useful
when it shows up in search:
1) it gives you a useful connection you didn't anticipate
   (e.g. a combinatorial interpretation, closed form,
   recurrence or other algorithm to generate)
2) you directly searched for it, e.g. id:A107222 or
   the above (id:A1000*).  Useful because it saves you the computational work.
   Also constants, e.g. search for 6,6,9,2,0,1,6,0,9 (feigenbaum const.)
   (but: must the second hit really be included?)

The above seqs are also rather sparse and will unlike
show up spuriously.

Still, the id:A1000* ring my "arbitrary parameters" bell  :o)

I suggest to report annoying spurious hits to the list so
we get a better feeling of what actually dilutes the OEIS.

-- 
p=2^q-1 prime <== q>2, cosh(2^(q-2)*log(2+sqrt(3)))%p=0
Life is hard and then you die.