%I A053578
%S A053578 1,1,2,1,4,1,4,1,8,1,8,8,1,1,1,16,16,1,1,16,1,1,1,1,32,1,32,1,1,32,32,
%T A053578 1,1,1,1,1,1,64,1,1,1,1,1,64,1,64,1,64,1,1,1,1,1,1,1,1,1,1,1,1,128,1,1,
%U A053578 1,1,1,128,1,1,1,1,1,128,1,128,128,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1
%N A053578 Values of cototient function for A053577.
%C A053578 Except for 2^0=1, there are only finitely many values of k such that 
               cototient(k) = 2^m for fixed m.
%e A053578 For p prime, cototient[p]=1. Smallest values for which cototient[x]=2^w 
               are 6,12,24,96,192,..,49152 for w=2,3,4,5,6,...,15
%Y A053578 Cf. A051953, A053577.
%Y A053578 Sequence in context: A079276 A126210 A040005 this_sequence A029205 A072721 
               A035092
%Y A053578 Adjacent sequences: A053575 A053576 A053577 this_sequence A053579 A053580 
               A053581
%K A053578 nonn
%O A053578 1,3
%A A053578 Labos E. (labos(AT)ana.sote.hu), Jan 18 2000