Numbers having three 6's in base 8.

Terms

a(0) =438a(1) =950a(2) =1462a(3) =1974a(4) =2486a(5) =2998a(6) =3126a(7) =3190a(8) =3254a(9) =3318a(10) =3382a(11) =3446a(12) =3462a(13) =3470a(14) =3478a(15) =3486a(16) =3494a(17) =3502a(18) =3504a(19) =3505a(20) =3506a(21) =3507a(22) =3508a(23) =3509a(24) =3511a(25) =3518a(26) =3574a(27) =4022a(28) =4534a(29) =5046