Positions of negative coefficients in cyclotomic polynomial Phi_n(x), A063698 in binary.

Terms

a(0) =0a(1) =1a(2) =0a(3) =0a(4) =0a(5) =0a(6) =10a(7) =0a(8) =0a(9) =0a(10) =1010a(11) =0a(12) =100a(13) =0a(14) =101010a(15) =10010010a(16) =0a(17) =0a(18) =1000a(19) =0a(20) =1000100a(21) =100100010010a(22) =1010101010a(23) =0a(24) =10000a(25) =0a(26) =101010101010a(27) =0a(28) =10001000100a(29) =0