a(1) = 2, then a(n) = greatest prime factor of (a(n-1)^2+2).
A081173
a(1) = 2, then a(n) = greatest prime factor of (a(n-1)^2+2).
Terms
- a(0) =2a(1) =3a(2) =11a(3) =41a(4) =17a(5) =97a(6) =3137a(7) =13499a(8) =60741001a(9) =14158633
External references
- oeis: A081173