a(n) = ceiling(2^(n-1)/n).

Terms

a(0) =1a(1) =1a(2) =2a(3) =2a(4) =4a(5) =6a(6) =10a(7) =16a(8) =29a(9) =52a(10) =94a(11) =171a(12) =316a(13) =586a(14) =1093a(15) =2048a(16) =3856a(17) =7282a(18) =13798a(19) =26215a(20) =49933a(21) =95326a(22) =182362a(23) =349526a(24) =671089a(25) =1290556a(26) =2485514a(27) =4793491a(28) =9256396a(29) =17895698