If 2n = Sum 2^e_i, a(n) = Sum e_i.

Terms

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