Legendre symbol (n,13).

Terms

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