Duplicate of A030749.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =8a(7) =9a(8) =11a(9) =12a(10) =15a(11) =17a(12) =19a(13) =20a(14) =22a(15) =26a(16) =29a(17) =31a(18) =33a(19) =36a(20) =38a(21) =40a(22) =44a(23) =48a(24) =51a(25) =53a(26) =57a(27) =59a(28) =63