n written in fractional base 9/4.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =5a(6) =6a(7) =7a(8) =8a(9) =40a(10) =41a(11) =42a(12) =43a(13) =44a(14) =45a(15) =46a(16) =47a(17) =48a(18) =80a(19) =81a(20) =82a(21) =83a(22) =84a(23) =85a(24) =86a(25) =87a(26) =88a(27) =430a(28) =431a(29) =432