%I A090779
%S A090779 1,4,8,9,16,18,25,27,32,36,49,50,54,64,72,81,98,100,108,121,125,128,144,
%T A090779 147,162,169,196,200,216,225,242,243,250,256,288,289,294,324,338,343,
%U A090779 361,392,400,432,441,450,484,486,500,507,512,529,576,578,588,605,625
%N A090779 Numbers n such that n divides phi(n)^2.
%C A090779 Coincides with A073539 in the first 850000 entries and possibly more. 
               [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 08 2008]
%F A090779 a(n) seems to be asymptotic to c*n^2 with c=0.1....
%Y A090779 Sequence in context: A140269 A070003 A073539 this_sequence A166402 A034038 
               A069265
%Y A090779 Adjacent sequences: A090776 A090777 A090778 this_sequence A090780 A090781 
               A090782
%K A090779 nonn
%O A090779 1,2
%A A090779 Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 08 2004