Numbers with the property that all pairs of consecutive base-7 digits differ by more than 2.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =11a(7) =12a(8) =13a(9) =19a(10) =20a(11) =21a(12) =27a(13) =28a(14) =29a(15) =35a(16) =36a(17) =37a(18) =42a(19) =43a(20) =44a(21) =45a(22) =77a(23) =78a(24) =84a(25) =85a(26) =86a(27) =91a(28) =92a(29) =93