%I A117303
%S A117303 1,3,2,5,4,6,8,7,16,12,32,10,64,24,128,9,256,48,512,20,1024,96,2048,14,
%T A117303 4096,192,8192,40,16384,384,32768,11,65536,768,131072,80,262144,1536,
%U A117303 524288,28,1048576,3072,2097152,160,4194304,6144,8388608,18,16777216
%N A117303 Self-inverse permutaton of the natural numbers based on the bijection 
               (2*x-1)*2^(y-1) <--> (2*y-1)*2^(x-1).
%C A117303 a(a(n)) = n; fixed points A014480: a(A014480(n)) = A014480(n). - Reinhard 
               Zumkeller (reinhard.zumkeller(AT)gmail.com), Apr 27 2006
%H A117303 <a href="Sindx_Per.html#IntegerPermutation">Index entries for sequences 
               that are permutations of the natural numbers</a>
%F A117303 a(n) = (2*A001511(n) - 1) * 2^(A003602(n) - 1).
%Y A117303 Cf. A000265, A007814, A006519, A005408, A000079.
%Y A117303 Cf. A118413, A118416.
%Y A117303 Sequence in context: A118209 A109451 A160017 this_sequence A054068 A054069 
               A135762
%Y A117303 Adjacent sequences: A117300 A117301 A117302 this_sequence A117304 A117305 
               A117306
%K A117303 nonn
%O A117303 1,2
%A A117303 Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Apr 24 2006