sequences based on ab-cd

[Frank Ellermann]

Rainer Rosenthal wrote:

> S1: 1,1,1,1,0,1,1,-1,1,2,-3,5,17,-91,1532,139497,-213710951,...

I skip your other examples, because I don't understand what
this is about, but formatting signed sequences is quite easy.

One of my scripts formats your terms as:

%I A000001 
%S A000001 1,1,1,1,0,1,1,1,1,2,3,5,17,91,1532,139497,213710951 
%V A000001 1,1,1,1,0,1,1,-1,1,2,-3,5,17,-91,1532,139497,-213710951 
%N A000001 a(n)=?????????? 
%K A000001 sign,more 
%O A000001 0,10 
%A A000001 Your name (your.address at example), Nov 18 2003 

So you have the signed terms in lines %V, %W, and %X.  Exactly
the same terms (without sign) appear in %S, %T, and %U.  Add a
name in %N, an example in %e, comments in %C, etc., there are
many examples in OEIS, for further details see the FAQ... ;-)

Or use the Web interface.  If your sequences are related, and
you want a reference from S1 to S2 and v.v., use the "dispenser"
to reserve e.g. two sequence numbers.

Then you could use lines like %Y A090001 A090002 (in A09001)
resp, %Y A090002 A090001 (in A09002).

> S3: 1,1,1,1,0,-1,-1,-1,-1,0,-1,1,-1,1,0,1 (last 5 repeating)
[...]
> I do not know whether S3 is allowed.

Maybe it's not interesting.  Of course you could (IMHO should)
check your sequences with superseeker, maybe you find a listed
Boustrophedon transform of S3.
                                Bye, Frank