Numbers n such that the n-th Fibonacci number is prime, but cannot be written in the form a^2 + 6*b^2.
A216570
Numbers n such that the n-th Fibonacci number is prime, but cannot be written in the form a^2 + 6*b^2.
Terms
- a(0) =3a(1) =4a(2) =5a(3) =7a(4) =11a(5) =13a(6) =17a(7) =29a(8) =43a(9) =83a(10) =131a(11) =137a(12) =449a(13) =509a(14) =569a(15) =571a(16) =2971a(17) =4723a(18) =5387a(19) =9677a(20) =14431a(21) =30757a(22) =104911a(23) =130021a(24) =148091a(25) =201107a(26) =397379a(27) =433781a(28) =604711a(29) =931517
External references
- oeis: A216570