%I A104104
%S A104104 1,0,1,0,0,1,0,1,1,0,1,0,0,1,0,1,1,0,1,0,0,1,0,1,1,0,1,0,0,1,0,1,0,1,0,
%T A104104 1,1,0,1,0,0,1,0,1,1,0,1,0,0,1,0,1,1,0,1,0,0,1,0,1,1,0,1,0,1,0,1,0,0,1,
%U A104104 0,1,1,0,1,0,0,1,0,1,1,0,1,0,0,1,0,1,1,0,1,0,0,1,0,1,0,1,0,1,1,0,1,0,0
%N A104104 a(1) = 1, if A(k) = sequence of first 2^(k-1) terms and if B(k) is A(k) 
               with 0's and 1's exchanged, then A(k+1) = A(k)A(k) if a(k) = 0, A(k+1) 
               = A(k)B(k) if a(k) = 1.
%H A104104 Leroy Quet, <a href="http://www.prism-of-spirals.net/">Home Page</a> 
               (listed in lieu of email address)
%t A104104 f[l_]:=Join[l,If[l[[Log[2,Length[l]]+1]]==0,l,1-l]];Nest[f,{1},7] (*Chandler*)
%Y A104104 Cf. A104105, A104106, A104107, A104108.
%Y A104104 Sequence in context: A129569 A030658 A112539 this_sequence A078588 A039983 
               A152490
%Y A104104 Adjacent sequences: A104101 A104102 A104103 this_sequence A104105 A104106 
               A104107
%K A104104 easy,nonn
%O A104104 1,1
%A A104104 Leroy Quet, Mar 04 2005
%E A104104 Edited and extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), 
               Apr 05 2009