Squarefree integers k such that x^4 - k*y^2 = 1 has a nontrivial solution.

Terms

a(0) =5a(1) =6a(2) =15a(3) =29a(4) =39a(5) =145a(6) =210a(7) =255a(8) =410a(9) =455a(10) =791a(11) =905a(12) =915a(13) =985a(14) =1111a(15) =1295a(16) =1785a(17) =2031a(18) =3603a(19) =3815a(20) =4199a(21) =7215a(22) =8547a(23) =8555a(24) =10421a(25) =12155a(26) =13015a(27) =13271a(28) =14430a(29) =16913