Denominators of sequence {b(1), b(2),...} which when COMPOSED with itself gives {1,2,3,...}.

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =8a(5) =1a(6) =16a(7) =64a(8) =128a(9) =128a(10) =256a(11) =512a(12) =1024a(13) =2048a(14) =2048a(15) =16384a(16) =32768a(17) =32768a(18) =65536a(19) =131072a(20) =262144a(21) =131072a(22) =524288a(23) =2097152a(24) =4194304a(25) =4194304a(26) =8388608a(27) =2097152a(28) =16777216a(29) =134217728