Numbers with the property that all pairs of consecutive base-7 digits differ by more than 1.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =10a(7) =11a(8) =12a(9) =13a(10) =14a(11) =18a(12) =19a(13) =20a(14) =21a(15) =22a(16) =26a(17) =27a(18) =28a(19) =29a(20) =30a(21) =34a(22) =35a(23) =36a(24) =37a(25) =38a(26) =42a(27) =43a(28) =44a(29) =45