Numerator of 2^n/n.

Terms

a(0) =2a(1) =2a(2) =8a(3) =4a(4) =32a(5) =32a(6) =128a(7) =32a(8) =512a(9) =512a(10) =2048a(11) =1024a(12) =8192a(13) =8192a(14) =32768a(15) =4096a(16) =131072a(17) =131072a(18) =524288a(19) =262144a(20) =2097152a(21) =2097152a(22) =8388608a(23) =2097152a(24) =33554432a(25) =33554432a(26) =134217728a(27) =67108864a(28) =536870912a(29) =536870912