n written in fractional base 7/3.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =5a(6) =6a(7) =30a(8) =31a(9) =32a(10) =33a(11) =34a(12) =35a(13) =36a(14) =60a(15) =61a(16) =62a(17) =63a(18) =64a(19) =65a(20) =66a(21) =320a(22) =321a(23) =322a(24) =323a(25) =324a(26) =325a(27) =326a(28) =350a(29) =351