a(1) = 1, a(n+1) = smallest prime divisor of 1 + product of all the primes p <= a(n).

A224894

a(1) = 1, a(n+1) = smallest prime divisor of 1 + product of all the primes p <= a(n).

Terms

    a(0) =1a(1) =2a(2) =3a(3) =7a(4) =211a(5) =1051a(6) =91943a(7) =206705778299

External references