Write 2n-1 in base 4 and juxtapose.

Terms

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