Omit 2's from n.

Terms

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