Unstable look-up(?!) (was: Re: A072511 & A121516)

[zak seidov]

--- cino hilliard <hillcino368 at hotmail.com> wrote:

> Hi,
> I do not understand the issue here.
<skip>
> If sequence a(1),a(2),a(3),a(4)... is out
> there, then searching 
> a(2),a(3),(a4)...will show up
> and display the A number for a(1),a(2),a(3),a(4)...

Me: Exactly! 
But not seldom this is not the case -
and I don't know who/what'd be blamed.
Some my sequences happened to be duplicate (and dead!)
after some time and mostly by myself.

Apparently look-up is not stable(?!) - 
sorry for such brave assumption, 
but have anyone else encountered with such cases?
Thanks, Zak 


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