Largest prime < 10*a(n-1), a(1)=13.

A124298

Largest prime < 10*a(n-1), a(1)=13.

Terms

    a(0) =13a(1) =127a(2) =1259a(3) =12589a(4) =125887a(5) =1258847a(6) =12588461a(7) =125884529a(8) =1258845277a(9) =12588452743a(10) =125884527427

External references