[seqfan] Re: Largest (a1) in the OEIS

franktaw at netscape.net franktaw at netscape.net
Sat Aug 27 02:37:48 CEST 2011

Some of this already exists. The underscore "_" represents an arbitrary 
number, so 7,_,38 will match 7 (not 1), anything, 38. Likewise, two 
underscores will match an arbitrary sequence of numbers - 11,__,99 for 
your example.. (I'm not sure if it will match nothing, or if it 
requires at least 1 number.)

There's been some discussion of matching at the beginning; the problem 
is that "the beginning" may change. The 1,3,8 you're looking for may 
actually be in the database as 0,1,3,8, with offset 0.

As part of my F-numbers proposal, I suggested allowing specification of 
the index a number is to be found at. I.e., 1->1,3,8 would look for 
a(1) = 1, followed immediately by 3 and 8.

Franklin T. Adams-Watters

-----Original Message-----
From: David Wilson <davidwwilson at comcast.net>

But seriously, some form of globbing might help with searching. For 


to look up 1,3,8 at beginning of


to look up an 1 followed by unknown number followed by 38,


to look up 11 followed by zero or more unknown elements followed by 99, 

On 8/26/2011 12:14 PM, David Newman wrote:
> I'm looking at A095646, but I don't see any line that entitiled 
"Sequence in
> context."  What am I doing wrong?
>   Of course! The sequences are sorted - see the "Sequence in context" 


Seqfan Mailing list - http://list.seqfan.eu/


More information about the SeqFan mailing list