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

[Richard Mathar]

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 All greater than and less than signs have been replaced by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