[seqfan] Re: A006451 = n such that n*(n+1)/2+1 is square?
Alexander Povolotsky
apovolot at gmail.com
Wed Oct 14 04:50:24 CEST 2009
---------- Forwarded message ----------
From: Allan Gottlieb <gottlieb at nyu.edu>
Date: Tue, 13 Oct 2009 07:28:40 -0400
Subject: Re: OEIS's A006451 = n such that n*(n+1)/2+1 is square?
I do indeed edit puzzle corner for tech review. Do you know the issue
of tech review where this was mentioned. If not, can you point me at
the msg where tech review is mentioned. Perhaps there are enough search
terms there for me to find it. I do have all the columns I wrote (40+
years) and for the last few decades there were written electronically
using beautiful text files so are searchable.
allan
On 10/13/09, N. J. A. Sloane <njas at research.att.com> wrote:
> I haven't been following this discussion, but I did see
> this question:
>
>> One could in principle trace this back via page A.490 of the Plouffe
>> thesis
> (as available from the OEIS link), if it would be clear which journal TR
> is (Transcations of the Am. Math Soc?, but this does not have anything
> on page 73 of its July 1973 issue related to diophantine equations.).
>
>
> "TR" = Technology Review (see the list of abbreviations
> in the 1995 Encyclopedia of Integer Sequences)
>
> Neil
> ---------- Forwarded message ----------
> From: Richard Mathar <mathar at strw.leidenuniv.nl>
> Date: Sat, 10 Oct 2009 14:34:47 +0200
> Subject: A006451 = n such that n*(n+1)/2+1 is square?
> To: seqfan at seqfan.eu
>
> As a followup to
>
> http://list.seqfan.eu/pipermail/seqfan/2009-October/002522.html :
>
> One could in principle trace this back via page A.490 of the Plouffe thesis
> (as available from the OEIS link), if it would be clear which journal TR
> is (Transcations of the Am. Math Soc?, but this does not have anything
> on page 73 of its July 1973 issue related to diophantine equations.).
>
> So the next guess is it "Technology Review" just as quoted in the A006451,
> and there may be MIT members who have access to it, but I don't:
> https://www.technologyreview.com/
> or one could write to Allan Gottlieb who might be the author of the article,
> http://cs.nyu.edu/~gottlieb/
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