%I

%S 1,7,13,19,31,37,49,55,61,67,85,91,109,121,127,139,157,175,181,193,

%T 199,211,217,235,247,265,289,301,307,313,319,325,337,379,391,397,409,

%U 415,445,451,469,487,499,517,535,541,571,577,589,595,631,667,679,685,691

%N Numbers n such that (n+2) divides 2^(n-1)-1.

%C Is a(n)/n/log(n)/log(log(n)) bounded ?

%K easy,nonn

%O 1,2

%A _Benoit Cloitre_, Apr 09 2003