n written in fractional base 4/2.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =20a(5) =21a(6) =22a(7) =23a(8) =200a(9) =201a(10) =202a(11) =203a(12) =220a(13) =221a(14) =222a(15) =223a(16) =2000a(17) =2001a(18) =2002a(19) =2003a(20) =2020a(21) =2021a(22) =2022a(23) =2023a(24) =2200a(25) =2201a(26) =2202a(27) =2203a(28) =2220a(29) =2221