[seqfan] Re: Fwd: Your A051217 Nonnegative numbers of the form 6^x-y^2.
davidwwilson at comcast.net
Tue Nov 15 00:53:40 CET 2011
Stop using that terminology.
The sequence is perfectly well-defined.
n >= 0 is in the sequence iff it is of the form 6^x - y^2.
Every n >= 0 is either of this form or it is not.
The question is, is the sequence computable?
Specifically, is there an algorithm that determines if n is in or out of
The real question is,
On 11/11/2011 9:57 AM, Charles Greathouse wrote:
> No, scratch that. I can show that the sequence is well-defined
> through ten million. No general proof yet, though.
> Charles Greathouse
> Case Western Reserve University
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