a(0)=0, a(1)=1, a(n) = a(n-1) + sum(a(floor(n/d)), d=2^x, x=1...n).

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =6a(5) =9a(6) =13a(7) =17a(8) =26a(9) =35a(10) =47a(11) =59a(12) =76a(13) =93a(14) =114a(15) =135a(16) =170a(17) =205a(18) =249a(19) =293a(20) =352a(21) =411a(22) =482a(23) =553a(24) =646a(25) =739a(26) =849a(27) =959a(28) =1094a(29) =1229