Summatory Rudin-Shapiro sequence for 2^(n-1).

Terms

a(0) =2a(1) =3a(2) =3a(3) =5a(4) =5a(5) =9a(6) =9a(7) =17a(8) =17a(9) =33a(10) =33a(11) =65a(12) =65a(13) =129a(14) =129a(15) =257a(16) =257a(17) =513a(18) =513a(19) =1025a(20) =1025a(21) =2049a(22) =2049a(23) =4097a(24) =4097a(25) =8193a(26) =8193a(27) =16385a(28) =16385a(29) =32769