a(0) = 3; for n > 0, a(n) is the greatest prime factor of a(n-1)^2 - 2.
A031440
a(0) = 3; for n > 0, a(n) is the greatest prime factor of a(n-1)^2 - 2.
Terms
- a(0) =3a(1) =7a(2) =47a(3) =2207a(4) =4481a(5) =26111a(6) =189017a(7) =67271a(8) =11815633a(9) =606737a(10) =708641a(11) =354023a(12) =125332284527
External references
- oeis: A031440