Numbers with the property that all pairs of consecutive base-9 digits differ by more than 1.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =7a(7) =8a(8) =12a(9) =13a(10) =14a(11) =15a(12) =16a(13) =17a(14) =18a(15) =22a(16) =23a(17) =24a(18) =25a(19) =26a(20) =27a(21) =28a(22) =32a(23) =33a(24) =34a(25) =35a(26) =36a(27) =37a(28) =38a(29) =42