Norm of fundamental unit of real quadratic field with discriminant A003658(n), n >= 2.

Terms

a(0) =-1a(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) =1a(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) =-1a(27) =1a(28) =1a(29) =-1