[seqfan] Re: non-multiples of 12 and divisibility of n/p^m, A168186 and A160453

Robert Munafo mrob27 at gmail.com
Tue Jan 26 21:25:38 CET 2010


Richard --

Regarding A168186 vs. A160453: It seems one would need to gain a greater
understanding of the implications of Masahiko Shin's definition of A160453.
As a first attempt one could write a program to calculate both sequences,
which would allow testing quite a few terms pretty quickly.

Regarding A168186 vs. A023805: They differ as soon as the base 11
representation starts to have more than 2 digits. The first counterexample
is the number 121 (in decimal) which is a member of A168186 but not a member
of  A023805.

- Robert

On Tue, Jan 26, 2010 at 15:16, Richard Mathar <mathar at strw.leidenuniv.nl>
wrote:
>
> Where do these two sequences differ:
>
> http://research.att.com/~njas/sequences/?q=id:A168186|id:A160453<http://research.att.com/%7Enjas/sequences/?q=id:A168186%7Cid:A160453>
>
1,2,3,4,5,6,7,8,9,10,11,13,14,15,16,17,18,19,20,21,22,23,25,26,27,28,29,30,31,32,33,34,35,37,38,39,40,41,42,43,44,45,46,47,49,50,51,52,53,54,55,56,57,58,59,61,62,63,64,65,66,67,68,69,70,71,73,74,75,76,77,78,
>
1,2,3,4,5,6,7,8,9,10,11,13,14,15,16,17,18,19,20,21,22,23,25,26,27,28,29,30,31,32,33,34,35,37,38,39,40,41,42,43,44,45,46,47,49,50,51,52,53,54,55,56,57,58,59,61,62,63,64,65,66,67,68,69,70,71,73,74,75,76,77,78
>
> and are these essentially the same:
> http://research.att.com/~njas/sequences/?q=id:A168186|id:A023805<http://research.att.com/%7Enjas/sequences/?q=id:A168186%7Cid:A023805>
>
1,2,3,4,5,6,7,8,9,10,11,13,14,15,16,17,18,19,20,21,22,23,25,26,27,28,29,30,31,32,33,34,35,37,38,39,40,41,42,43,44,45,46,47,49,50,51,52,53,54,55,56,57,58,59,61,62,63,64,65,66,67,68,69,70,71,73,74,75,76,77,78,
>
0,1,2,3,4,5,6,7,8,9,10,11,13,14,15,16,17,18,19,20,21,22,23,25,26,27,28,29,30,31,32,33,34,35,37,38,39,40,41,42,43,44,45,46,47,49,50,51,52,53,54,55,56,57,58,59,61,62,63,64,65,66,67,68,69,70,71,73,74,
>


--
 Robert Munafo  --  mrob.com



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