[seqfan] Re: apparently unique infinite sequences related to the sum of divisors

israel at math.ubc.ca israel at math.ubc.ca
Thu Jul 9 21:06:24 CEST 2015

How do you know your values for A259934 are correct? It's true that a(n) - 
d(a(n)) = a(n-1) for the listed values, but how do you know you don't run 
into a dead end? Falcao apparently (I don't read Russian) proved there is 
an infinite sequence, but there are also long finite sequences that have 
dead ends.


On Jul 9 2015, Max Alekseyev wrote:

>I'd like to draw your attention to two newly added nice sequences:
>Comments are welcome.
>Seqfan Mailing list - http://list.seqfan.eu/

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