Numbers in which all pairs of consecutive base-9 digits differ by 3.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =7a(7) =8a(8) =13a(9) =23a(10) =27a(11) =33a(12) =37a(13) =43a(14) =47a(15) =53a(16) =57a(17) =67a(18) =77a(19) =118a(20) =124a(21) =209a(22) =215a(23) =246a(24) =300a(25) =337a(26) =391a(27) =428a(28) =482a(29) =513