Write 2n-1 in base 8 and juxtapose.

Terms

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