a(n) = index of first odd prime number in the (n-th)-order Fibonacci sequence Fn, or 0 if no such index exists.
A302990
a(n) = index of first odd prime number in the (n-th)-order Fibonacci sequence Fn, or 0 if no such index exists.
Terms
- a(0) =0a(1) =0a(2) =4a(3) =6a(4) =9a(5) =10a(6) =40a(7) =14a(8) =17a(9) =19a(10) =361a(11) =23a(12) =90a(13) =26a(14) =373a(15) =47a(16) =288a(17) =34a(18) =75a(19) =38a(20) =251a(21) =43a(22) =67a(23) =47a(24) =74a(25) =310a(26) =511a(27) =151534a(28) =57a(29) =20608
External references
- oeis: A302990