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

Neil Sloane njasloane at gmail.com
Sat Aug 24 22:46:36 CEST 2013


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/
>



-- 
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Neil J. A. Sloane, President, OEIS Foundation
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