Euclid-Mullin sequence: a(1) = 2, a(n+1) is the largest prime factor of 1 + Product_{k=1..n} a(k).

A000946

Euclid-Mullin sequence: a(1) = 2, a(n+1) is the largest prime factor of 1 + Product_{k=1..n} a(k).

Terms

    a(0) =2a(1) =3a(2) =7a(3) =43a(4) =139a(5) =50207a(6) =340999

External references