Numbers y such that p = x^2 - 5y^2, where p = 0, 1, or 4 (mod 5).

Terms

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