Number of 1's in n-th term of A006711.

Terms

a(0) =1a(1) =2a(2) =1a(3) =3a(4) =2a(5) =6a(6) =6a(7) =6a(8) =5a(9) =12a(10) =11a(11) =16a(12) =18a(13) =30a(14) =32a(15) =48a(16) =61a(17) =85a(18) =103a(19) =148a(20) =192a(21) =247a(22) =307a(23) =427a(24) =578a(25) =754a(26) =965a(27) =1324a(28) =1783a(29) =2349