Search: id:A050269
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%I A050269
%S A050269 1,2,3,4,5,1,3,6,7,8,9,2,4,10,11,12,1,8,13,3,5,14,15,16,17,4,6,18,3,8,
%T A050269 19,20,21,1,2,5,7,12,15,22,23,24,25,6,8,26,27,4,12,28,29,7,9,30,3,16,
%U A050269 31,32,1,24,33,8,10,34,35,36,5,16,37,2,3,9,11,21,24,38,39,4,20,40,41
%N A050269 Smallest value a for Diophantine 1-doubles (a,b) ordered by smallest 
               b.
%H A050269 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               DiophantusProperty.html">Link to a section of The World of Mathematics.</
               a>
%H A050269 P. Gibbs, <a href="http://arXiv.org/abs/math.NT/0107203">Diophantine 
               quadruples and Cayley's hyperdeterminant</a>.
%o A050269 (PARI) an=vector(81); m=0; for(b=2,43, for(a=1,b, if(issquare(a*b+1), 
               an[ m++ ]=a))); an
%Y A050269 Cf. A050270.
%Y A050269 Sequence in context: A106652 A053827 A033926 this_sequence A097151 A071500 
               A071516
%Y A050269 Adjacent sequences: A050266 A050267 A050268 this_sequence A050270 A050271 
               A050272
%K A050269 nonn
%O A050269 1,2
%A A050269 Eric Weisstein (eric(AT)weisstein.com)

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