Search: id:A045980
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%I A045980
%S A045980 0,1,2,7,8,9,16,19,26,27,28,35,37,54,56,61,63,64,65,72,91,98,117,124,
%T A045980 125,126,127,128,133,152,169,189,208,215,216,217,218,224,243,250,271,
%U A045980 279,280,296,316,331,335,341,342,343,344,351,370,386,387,397,407,432
%N A045980 Numbers of the form x^3 + y^3 or x^3 - y^3.
%D A045980 B. C. Berndt, Ramanujan's Notebooks Part IV, Springer-Verlag, see p. 
               86.
%H A045980 T. D. Noe, <a href="b045980.txt">Table of n, a(n) for n=1..1000</a>
%H A045980 Kevin A. Broughan, <a href="http://www.cs.uwaterloo.ca/journals/JIS/index.html">
               Characterizing the Sum of Two Cubes</a>, J. Integer Seqs., Vol. 6, 
               2003.
%H A045980 M. Kim, <a href="http://arXiv.org/abs/math.NT/0210329">Diophantine equations 
               in two variables</a>
%e A045980 7 = (2)^3 + (-1)^3.
%t A045980 Union[Select[Sort[Flatten[Table[{j^3-i^3, j^3+i^3}, {i, 0, 20}, {j, i, 
               20}]]], #<20^3-19^3&]]
%Y A045980 Sequence in context: A047354 A037455 A020675 this_sequence A104339 A039005 
               A022431
%Y A045980 Adjacent sequences: A045977 A045978 A045979 this_sequence A045981 A045982 
               A045983
%K A045980 nonn,easy,nice
%O A045980 1,3
%A A045980 N. J. A. Sloane (njas(AT)research.att.com).

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