[seqfan] Re: Checking A174216

[Vladimir Shevelev]

Thanks to Richard and Max for checking a(11) of A174216. Since the calculation of different terms are almost independent (except of the condition a(n)>a(n-1)), then one cannot exclude that further terms of A174216 could be true. I kindly ask you to make an independent checking of some further terms.

Best regards,
Vladimir

----- Original Message -----
From: Max Alekseyev <maxale at gmail.com>
Date: Saturday, October 30, 2010 5:37
Subject: [seqfan] Re: Checking A174216
To: Sequence Fanatics Discussion list <seqfan at list.seqfan.eu>
Cc: seqfan at seqfan.eu

> I confirm that a(11)=18927.
> 
> Here is my PARI/GP code for A174216, starting with the second 
> term and
> listing all terms below 10^5:
> 
> { a=14; for(n=10, 10^5, if( gcd(a,n-1-(-1)^n)==1, a+=1, a=2*n-
> 4); if(
> 2*a==3*(n-1), print1(n,", ") )) }
> 
> 27, 63, 123, 279, 567, 1143, 2307, 4623, 9447, 18927, 38283, 77139,
> 
> Regards,
> Max
> 
> On Fri, Oct 29, 2010 at 4:04 PM, Richard Mathar
> <mathar at strw.leidenuniv.nl> wrote:
> >
> > In March, I changed A174216(11) to 18927, which was reverted
> > by the author of the sequence to 19263. Can someone independently
> > check the terms in A174216?
> > This concerns primarily n=11, k=18927 with A174214(k)=232257 and
> > 3*(k-1)=464514 (all values according to my calculation).
> >
> > http://oeis.org/classic/?q=id%3AA174214|id%3AA174216
> >
> >
> >
> > _______________________________________________
> >
> > Seqfan Mailing list - http://list.seqfan.eu/
> >
> 
> 
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> 
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> 

 Shevelev Vladimir‎