[seqfan] Re: Digits of S differ by 1 (or 2, or 3...)

Eric Angelini Eric.Angelini at kntv.be
Sat Aug 24 23:02:51 CEST 2013


Many thanks, Neil !

Propulsé d'un aPhone



Le 24 août 2013 à 22:46, "Neil Sloane" <njasloane at gmail.com> a écrit :

> Very nice. A228326, A228327, A228328.
> 
> 
> On Fri, Aug 23, 2013 at 5:44 PM, Eric Angelini <Eric.Angelini at kntv.be>wrote:
> 
>> 
>> Hello SeqFans,
>> - S starts with 0;
>> - two consecutive digits of S always differ by 1;
>> - S is always extended with the smallest integer not yet in S:
>> 
>> S=0,1,2,3,4,5,6,7,8,9,87,65,43,21,23,45,67,89,876,54,32,10,12,34,56,78,98,76,543,210,101,212,121,232,123,...
>> 
>> T(0) shows a difference of 2 (between 2 consecutive digits):
>> T(0)=0,2,4,6,8,64,20,24,68,642,42,46,86,420,202,424,242,464,246,468,646,...
>> 
>> T(1) shows the same difference:
>> 
>> T(1)=1,3,5,7,9,75,31,35,79,753,13,57,97,53,135,313,131,353,531,357,535,757,575,797,579,...
>> 
>> Etc. A few other differences are possible (with other starts too).
>> My apologizes for the possible errors
>> in computing by hand these devilish seq.
>> Best,
>> É.
>> 
>> 
>> 
>> 
>> _______________________________________________
>> 
>> Seqfan Mailing list - http://list.seqfan.eu/
>> 
> 
> 
> 
> -- 
> Dear Friends, I have now retired from AT&T. New coordinates:
> 
> Neil J. A. Sloane, President, OEIS Foundation
> 11 South Adelaide Avenue, Highland Park, NJ 08904, USA.
> Also Visiting Scientist, Math. Dept., Rutgers University, Piscataway, NJ.
> Phone: 732 828 6098; home page: http://NeilSloane.com
> Email: njasloane at gmail.com
> 
> _______________________________________________
> 
> Seqfan Mailing list - http://list.seqfan.eu/


More information about the SeqFan mailing list