n written in fractional base 6/4.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =5a(6) =40a(7) =41a(8) =42a(9) =43a(10) =44a(11) =45a(12) =420a(13) =421a(14) =422a(15) =423a(16) =424a(17) =425a(18) =4200a(19) =4201a(20) =4202a(21) =4203a(22) =4204a(23) =4205a(24) =4240a(25) =4241a(26) =4242a(27) =4243a(28) =4244a(29) =4245