Numbers whose base-6 expansion has no run of digits with length < 2.

Terms

a(0) =7a(1) =14a(2) =21a(3) =28a(4) =35a(5) =43a(6) =86a(7) =129a(8) =172a(9) =215a(10) =252a(11) =259a(12) =266a(13) =273a(14) =280a(15) =287a(16) =504a(17) =511a(18) =518a(19) =525a(20) =532a(21) =539a(22) =756a(23) =763a(24) =770a(25) =777a(26) =784a(27) =791a(28) =1008a(29) =1015