[seqfan] Re: A269254 and A034807

Bob Selcoe rselcoe at entouchonline.net
Thu Oct 26 01:06:57 CEST 2017


Hans,

Thanks. Glad you caught 2525 (not 2510 typo).  

and yes, a(724) and a(6726) = 2 do not fit the pattern as I expected. 

But it does still seem like there is a relationship between desired a(n) = -1 and A034807; especially if a(2525) holds.

Any thoughts, anyone??

Bob


Sent from my iPhone

> On Oct 25, 2017, at 4:56 PM, Hans Havermann <gladhobo at bell.net> wrote:
> 
> Bob Selcoe:
> 
>> L_5 = j^5 - 5j^3 + 5n; n = a(L_5) = -1 when j = {3, 4, 5...}, so expect n = {123, 724, 2510...}.
> 
> 123, 724, 2525, 6726, 15127, 30248, ... I think. a(2525) didn't find anything in my 20-minute test but I'll point out that a(724) = a(6726) = 2, which strikes me as problematic.
> 
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