Numbers with the property that all pairs of consecutive base-6 digits differ by 0 or 1.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =7a(7) =8a(8) =13a(9) =14a(10) =15a(11) =20a(12) =21a(13) =22a(14) =27a(15) =28a(16) =29a(17) =34a(18) =35a(19) =36a(20) =37a(21) =42a(22) =43a(23) =44a(24) =49a(25) =50a(26) =51a(27) =78a(28) =79a(29) =80