Search: id:A071571
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%I A071571
%S A071571 2,4,8,6,32,64,12,256,512,24,2048,36,30,16384,32768,96,72,262144,192,
%T A071571 1048576,2097152,60,8388608,216,768,67108864,288,1536,536870912,
%U A071571 1073741824,120,576,8589934592,6144,34359738368,68719476736,180,864
%N A071571 Smallest number whose square has exactly 2n+1 divisors.
%C A071571 Only squares have an odd number of divisors.
%e A071571 a(4)=6 because it is the smallest number followed by 10,14,15,16,21,22,
               ... whose squares have 2*4 + 1, i.e. 9 divisors.
%Y A071571 Cf. A005179.
%Y A071571 Identical to A016017 shifted left.
%Y A071571 Sequence in context: A131886 A061284 A016017 this_sequence A153130 A029898 
               A021406
%Y A071571 Adjacent sequences: A071568 A071569 A071570 this_sequence A071572 A071573 
               A071574
%K A071571 nonn
%O A071571 1,1
%A A071571 Lekraj Beedassy (blekraj(AT)yahoo.com), May 31 2002
%E A071571 More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Jun 05 2002

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