%I A050384
%S A050384 1,15,33,35,51,65,69,77,85,87,91,95,115,119,123,133,141,143,145,159,161,
%T A050384 177,185,187,209,213,215,217,221,235,247,249,255,259,265,267,287,295,
%U A050384 299,303,319,321,323,329,335,339,341,345,365,371,377,391,393,395,403
%N A050384 Nonprimes such that n and phi(n) are relatively prime.
%C A050384 Also nonprimes n such that there is only one group of order n, i.e. A000001(n) 
               = 1.
%C A050384 Intersection of A018252 and A003277.
%C A050384 Also numbers n such that n and A051953[n] are relatively prime (Labos 
               E.).
%H A050384 T. D. Noe, <a href="b050384.txt">Table of n, a(n) for n = 1..10000</a>
%Y A050384 If the primes are included we get A003277. Cf. A000001, A000010 (phi).
%Y A050384 Sequence in context: A112147 A154369 A089966 this_sequence A142862 A053343 
               A068081
%Y A050384 Adjacent sequences: A050381 A050382 A050383 this_sequence A050385 A050386 
               A050387
%K A050384 nonn
%O A050384 1,2
%A A050384 Christian G. Bower (bowerc(AT)usa.net), Nov 15 1999.