Solution to a Pellian equation: least x such that x^2 - n*y^2 = +- 1.

Terms

a(0) =1a(1) =1a(2) =2a(3) =1a(4) =2a(5) =5a(6) =8a(7) =3a(8) =1a(9) =3a(10) =10a(11) =7a(12) =18a(13) =15a(14) =4a(15) =1a(16) =4a(17) =17a(18) =170a(19) =9a(20) =55a(21) =197a(22) =24a(23) =5a(24) =1a(25) =5a(26) =26a(27) =127a(28) =70a(29) =11