185 is special

[Maximilian Hasler]

On one hand, I believe there are holes in the numbering which might be filled
in one day, so it's potentially ill defined.
And, once again, same logical problem: if your sequence is A199999,
there will be severe conceptual problems starting at least from
a(199999) on...
Maximilian

On 6/1/07, Jon Schoenfield <jonscho at hiwaay.net> wrote:
> Has anyone mentioned the sequence
> "Positive integers n that do not appear in any of the first n sequences in
> OEIS"?
>
> ----- Original Message -----
> From: "Joshua Zucker" <joshua.zucker at gmail.com>
> To: "sequence fans" <seqfan at ext.jussieu.fr>
> Sent: Friday, June 01, 2007 4:57 PM
> Subject: Re: 185 is special
>
>
> > Don't forget the sequence
> > a(n) = smallest number not appearing as the nth term of a sequence in
> > OEIS.
> >
> > --Joshua Zucker
> >
> >
>
>
>



Every number belongs to at least one of four sequences:

1) odd, even
2) prime, composite
3) abundant, deficient, perfect
4) evil, odious
Can you extend this list?

So, 8795 is more about cut off point.

Tanya

---------- Original Message ----------------------------------

>Me, in a comment on the "185 is special" topic:
>
><<  I looked a while back (sometime last year?) for the smallest positive 
>number not listed among the terms of any sequence in the OEIS, and I think 
>it was somewhere in the upper 9000s.  I don't know if it's still in that 
>range....  >>
>
>Oops!  I think I was thinking about 9734, but had forgotten about 8795, of 
>which I was reminded just now in running across the page at
>
>http://math.crg4.com/uninteresting.html
>
>(which I thought some SEQFANs might find interesting).   :-)
>
>-- Jon
>
>
>


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When I started to work with sequences and numbers I had a rule for myself:
In general, avoid sequences with parameters, but:
- If there is a word for it, do not count it as a parameter (as in binary, squared, octagonal)
- As an exception, sometimes allow 2, 3, 10 and 100 as a parameter.

Now, if find a sequence interesting if I spent more than 10 minutes on it :-(

Tanya



---------- Original Message ----------------------------------

>
>But, arguably, without additional motivation, NONE of these hack 
>sequences will be "interesting" enough for inclusion in the OEIS.
>
>Right?
>



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