[seqfan] Re: A169902: all ones(?)

Andrew Weimholt andrew.weimholt at gmail.com
Sat Jul 10 00:00:44 CEST 2010


On 7/9/10, zak seidov <zakseidov at yahoo.com> wrote:
> According to
>
>  %N A169900 Earliest sequence such that xy | a(x+y) for all x>=1, y>=1,
>
>  the sequence should contain all ones: 1,1,1,1,1,1,1,1.
>
>  Zak

Not true!

Suppose x=3 and y=2
then 2*3 | a(2+3)   which I read as 2*3 divides a(2+3)
which means
a(5) must be divisible by 6.

Does " a|b " have another meaning besides "a divides b" ?

Andrew




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