Write 2n-1 in base 3 and juxtapose.

Terms

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