Every run of digits of n in base 5 has length 2.

Terms

a(0) =6a(1) =12a(2) =18a(3) =24a(4) =150a(5) =162a(6) =168a(7) =174a(8) =300a(9) =306a(10) =318a(11) =324a(12) =450a(13) =456a(14) =462a(15) =474a(16) =600a(17) =606a(18) =612a(19) =618a(20) =3756a(21) =3762a(22) =3768a(23) =3774a(24) =4050a(25) =4056a(26) =4068a(27) =4074a(28) =4200a(29) =4206