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

[israel at math.ubc.ca]

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.

Cheers,
Robert

On Jul 9 2015, Max Alekseyev wrote:

>SeqFans,
>
>I'd like to draw your attention to two newly added nice sequences:
>
>http://oeis.org/A259934
>http://oeis.org/A259935
>
>Comments are welcome.
>
>Regards,
>Max
>
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