Partial sums of A006519.

Terms

a(0) =1a(1) =3a(2) =4a(3) =8a(4) =9a(5) =11a(6) =12a(7) =20a(8) =21a(9) =23a(10) =24a(11) =28a(12) =29a(13) =31a(14) =32a(15) =48a(16) =49a(17) =51a(18) =52a(19) =56a(20) =57a(21) =59a(22) =60a(23) =68a(24) =69a(25) =71a(26) =72a(27) =76a(28) =77a(29) =79