# [seqfan] Re: sequences with regularity for rather large n

franktaw at netscape.net franktaw at netscape.net
Fri Nov 29 03:32:35 CET 2013

```This seems like a good solution for the stated problem. Unfortunately,
it does not help with a related problem that I think is more common.
This is where the terms are known from some point on, but it is not
actually known how many earlier terms there are. This typically happens
with sequences that are basically sets.

-----Original Message-----
From: Alonso Del Arte <alonso.delarte at gmail.com>
To: Sequence Fanatics Discussion list <seqfan at list.seqfan.eu>
Sent: Thu, Nov 28, 2013 5:50 pm
Subject: [seqfan] Re: sequences with regularity for rather large n

I too would like an example.

But just based on what you've said, I would say go for it. In your case,
almost any Editor would get the sense that you have genuinely made an
effort to ascertain what a(29) is but for the time being it's just not
possible. Let's further suppose that for n < 30 there are so many holes
you
can't string along more than two or three consecutive known terms. The
offset of 30 makes perfect sense.

Al

P.S. Today is Thanksgiving in the U. S., and for a few more minutes the
Sequence of the Day is

A000055 <http://oeis.org/A000055>: Number of trees with [image:
\scriptstyle n,\, n \,\ge\, 0, \,] unlabeled nodes.
{ 1, 2, 3, 6, 11, 23, 47, 106, 235, ... }  This is the sequence for
the
example search on the front page of the OEIS
<http://oeis.org/wiki/OEIS>.
This Thanksgiving we are thankful for, among other things, the OEIS,
which
is an invaluable resource in many mathematical and scientific endeavors.

On Thu, Nov 28, 2013 at 12:35 PM, John W. Nicholson
<reddwarf2956 at yahoo.com>wrote:

> Can you give an example?
>
>
>
> John W. Nicholson
>
>
>
> On Wednesday, November 27, 2013 4:40 AM, Vladimir Shevelev <
> shevelev at bgu.ac.il> wrote:
>
> Dear seqfans,
> >
> >I met with a problem. I know interesting sequences the regularity of
> which begins
> >with, say, n=30, but for n<30 not all its terms are known and what is
> more are
> >very difficult calculated using even modern computers. Can I use
offset 30
> >and in comment to explain the problem? Or it is not suitable for
OEIS?
> >
> >Best regards,
> >
> >_______________________________________________
> >
> >Seqfan Mailing list - http://list.seqfan.eu/
> >
> >
> >
>
> _______________________________________________
>
> Seqfan Mailing list - http://list.seqfan.eu/
>

--
Alonso del Arte
Author at
SmashWords.com<https://www.smashwords.com/profile/view/AlonsoDelarte>
Musician at ReverbNation.com <http://www.reverbnation.com/alonsodelarte>

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```