Cyclotomic polynomials evaluated at x=-1.

Terms

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