Duplicate of A026178.

Terms

a(0) =1a(1) =3a(2) =4a(3) =2a(4) =7a(5) =9a(6) =10a(7) =12a(8) =13a(9) =5a(10) =16a(11) =6a(12) =19a(13) =21a(14) =22a(15) =8a(16) =25a(17) =27a(18) =28a(19) =30a(20) =31a(21) =11a(22) =34a(23) =36a(24) =37a(25) =39a(26) =40a(27) =14a(28) =43a(29) =15