Write n in base 7, then complement each digit (d -> 6-d) and juxtapose.

Terms

a(0) =5a(1) =4a(2) =3a(3) =2a(4) =1a(5) =0a(6) =5a(7) =6a(8) =5a(9) =5a(10) =5a(11) =4a(12) =5a(13) =3a(14) =5a(15) =2a(16) =5a(17) =1a(18) =5a(19) =0a(20) =4a(21) =6a(22) =4a(23) =5a(24) =4a(25) =4a(26) =4a(27) =3a(28) =4a(29) =2