Thanks Neil -- I've omitted to say that integers ending in 00 (like 100, 1000...) are obviously not hitting 5... ________________________________________ De : math-fun-bounces@mailman.xmission.com [math-fun-bounces@mailman.xmission.com] de la part de Neil Sloane [njasloane@gmail.com] Date d'envoi : dimanche 11 mars 2012 19:55 À : math-fun Objet : Re: [math-fun] Hitting 5 Eric, Very nice! I just added A209674, which is the number of steps to reach 5. Neil On Sun, Mar 11, 2012 at 2:23 PM, Eric Angelini <Eric.Angelini@kntv.be>wrote:
Start sequence S with any integer. If a(n) is the sum of the last two digits of S, S will always hit 5 at some point. Best, É.
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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 _______________________________________________ math-fun mailing list math-fun@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun