Write n in base 3, then complement each digit (d -> 2-d) and juxtapose.

Terms

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