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%I #6 Mar 30 2012 18:38:52
%S 1,2,3,4,5,6,8,10,11,12,15,20,21,24,25,30,33,39,40,50,51,55,57,60,69,
%T 75,87,93,100,105,111,120,123,125,129,141,150,159,165,177,183,195,200,
%U 201,213,219,222,231,237,249,250,267,273,275,291,300,303,309,321,327
%N Let rep(n) be the n-th repunit number, sequence gives values of n such that : rep(n) == rep(3) (mod n).
%Y Cf. A002275.
%K easy,nonn
%O 1,2
%A _Benoit Cloitre_, Mar 05 2002
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