[seqfan] Re: Fw: COMMENT FROM submitA Zak Seidov A100836

[zak seidov]

Oooooooooooooooooooooooooooooooooops,

I've found my flaw (beleive or not?!)
during to-night's uneasy sleeping:

My calcs are apparently WRONG 
when a(n) & n are both odd -
funny enough!

Thank you all, responding and yet not, 
our great community under OEIS and NJAS!

Dear Neil, plz IGNORE this:

%E A100836 Terms corrected by Zak Seidov etc.

Again,
thank you all and sorry, zak


--- On Thu, 11/20/08, Richard Mathar <mathar at strw.leidenuniv.nl> wrote:

> From: Richard Mathar <mathar at strw.leidenuniv.nl>
> Subject: [seqfan] Re: Fw: COMMENT FROM submitA Zak Seidov A100836
> To: seqfan at seqfan.eu
> Date: Thursday, November 20, 2008, 4:55 PM
> zs> From seqfan-bounces at list.seqfan.eu  Thu Nov 20
> 22:26:28 2008
> zs> Date: Thu, 20 Nov 2008 13:02:14 -0800 (PST)
> zs> From: zak seidov <zakseidov at yahoo.com>
> zs> To: seqfan at seqfan.eu
> zs> Subject: [seqfan]  Fw: COMMENT FROM submitA Zak
> Seidov A100836
> zs> 
> zs> 
> zs> > From: The On-Line Encyclopedia of Integer
> Sequences <oeis at research.att.com>
> zs> > Subject: COMMENT FROM submitA Zak Seidov
> A100836
> zs> > To: njas at research.att.com
> zs> > Cc: zakseidov at yahoo.com
> zs> > Date: Thursday, November 20, 2008, 3:56 PM
> zs> > The following is a copy of the email message
> that was sent
> zs> > to njas
> zs> > containing the comment you submitted.
> zs> > 
> zs> > All greater than and less than signs have been
> replaced by
> zs> > their html
> zs> > equivalents.  They will be changed back when
> the message is
> zs> > processed.
> zs> > 
> zs> > This copy is just for your records.  No reply
> is expected.
> zs> >  
> zs> > %S A100836
> zs> >
> 2,3,8,7,24,17,48,31,80,49,120,17,168,97,26,127,288,161,360,49,244,241,
> zs> > %T A100836
> zs> >
> 528,127,624,337,728,97,840,199,960,511,604,577,1126,161,1368,721,170,
> zs> > %U A100836
> zs> >
> 351,1680,197,1848,241,1376,1057,2208,127,2400,1249,2024,337,2808,1457
> zs> > %E A100836 Terms corrected by Zak Seidov
> zs> > (zakseidov(AT)yahoo.com), Nov 20 2008
> 
> According to my calculation, a(21)=197 was correct in the
> sequence as it currently is, and should not be replaced by
> 244,
> since 197^2-1=38808 = 88*21^2.
> Also a(33)=485 was correct and should not be replaced by
> 604.
> Also a((35)=99 was correct and should not be replaced by
> 1126.
> Also a(45)=649 was correct and should not be replaced by
> 1376.
> Also a(51)=577 was correct and should not be replaced by
> 2024.
> 
> Same objections as Ray's.
> 
> A100836 := proc(n)
>         for k from 2 do
>                 if (k^2-1) mod (n^2) = 0 then
>                         RETURN(k) ;
>                 fi;
>         od;
> end:
> for n from 1 to 55 do
>         printf("%d %d\n",n,A100836(n)) ;
> od:
> 
> Richard Mathar
> 
> 
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