Numbers whose base-7 expansion has no run of digits with length < 2.

Terms

a(0) =8a(1) =16a(2) =24a(3) =32a(4) =40a(5) =48a(6) =57a(7) =114a(8) =171a(9) =228a(10) =285a(11) =342a(12) =392a(13) =400a(14) =408a(15) =416a(16) =424a(17) =432a(18) =440a(19) =784a(20) =792a(21) =800a(22) =808a(23) =816a(24) =824a(25) =832a(26) =1176a(27) =1184a(28) =1192a(29) =1200