Search: id:A081779
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%I A081779
%S A081779 30,240,390,810,1020,1920,2100,3120,3750,6090,6480,7380,7770,8160,10290,
%T A081779 10530,15360,16800,21030,21870,24960,27540,30000,32760,33390,46410,
%U A081779 48720,48750,51840,56700,59040,60060,62660
%N A081779 Ordered m for which m = k^3*a*b*(a^4 - b^4) determine (unique) solution 
               triples(k,a,b), where k=1,2,3,... and (a,b) are coprime pairs,not 
               both odd (i.e. of opposite parity).
%C A081779 Also called Saint-Exupery numbers.
%H A081779 N. des Vallieres and F. D'Agay, <a href="http://www.saint-exupery.org/
               home/inv_math1.htm">Le Probleme du Pharaon</a>
%F A081779 a(n)=A057096(n)/2.
%Y A081779 Cf. A057096.
%Y A081779 Sequence in context: A156372 A064241 A080569 this_sequence A069487 A008385 
               A061167
%Y A081779 Adjacent sequences: A081776 A081777 A081778 this_sequence A081780 A081781 
               A081782
%K A081779 nice,nonn
%O A081779 1,1
%A A081779 Lekraj Beedassy (blekraj(AT)yahoo.com), Apr 10 2003

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