[seqfan] Re: How to list pairs, triples, etc

Richard Mathar mathar at strw.leidenuniv.nl
Mon May 17 18:36:51 CEST 2010


If we plot the numbers c that do not occur in a
representation {1<=a<b<c with a+b, b+c and a+c three perfect squares}
as a function of their "index", for all c up
to roughly 6000, this graph is almost parabolic:
these c are roughly a function of the square of
their positions in this list of absentees. From
that point of view it does not look like there is some point
at which the graphs accelerates growth to ensure that all c after
some "threshold" c occur in these triples as a maximum member.


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