Duplicate of A023762.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =7a(7) =12a(8) =13a(9) =14a(10) =18a(11) =19a(12) =20a(13) =21a(14) =24a(15) =25a(16) =26a(17) =27a(18) =28a(19) =30a(20) =31a(21) =32a(22) =33a(23) =34a(24) =35a(25) =36a(26) =42a(27) =43a(28) =72a(29) =78