Möbius transform of A003963 (with alternate 0's omitted).

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =2a(5) =4a(6) =5a(7) =2a(8) =6a(9) =7a(10) =3a(11) =8a(12) =6a(13) =4a(14) =9a(15) =10a(16) =4a(17) =6a(18) =11a(19) =5a(20) =12a(21) =13a(22) =4a(23) =14a(24) =12a(25) =6a(26) =15a(27) =8a(28) =7a(29) =16