Yes, of course if the sequence already contains negative terms then we do something else. It depends on the particular sequence. Neil On Sun, Mar 11, 2012 at 7:10 PM, Eugene Salamin <gene_salamin@yahoo.com>wrote:
From: Neil Sloane <njasloane@gmail.com> To: math-fun <math-fun@mailman.xmission.com> Sent: Sunday, March 11, 2012 3:50 PM Subject: Re: [math-fun] RE : Hitting 5
The convention in the OEIS is to use -1 in cases when a term would be infinite or undefined. Neil
But can't -1 be a legitimate element of an integer sequence?
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-- Dear Friends, I will soon be retiring from AT&T. New coordinates: Neil J. A. Sloane, President, OEIS Foundation 11 South Adelaide Avenue, Highland Park, NJ 08904, USA Phone: 732 828 6098; home page: http://NeilSloane.com Email: njasloane@gmail.com