n written in fractional base 10/4.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =5a(6) =6a(7) =7a(8) =8a(9) =9a(10) =40a(11) =41a(12) =42a(13) =43a(14) =44a(15) =45a(16) =46a(17) =47a(18) =48a(19) =49a(20) =80a(21) =81a(22) =82a(23) =83a(24) =84a(25) =85a(26) =86a(27) =87a(28) =88a(29) =89