Largest prime < 10*a(n-1), a(1)=41.

A124338

Largest prime < 10*a(n-1), a(1)=41.

Terms

    a(0) =41a(1) =409a(2) =4079a(3) =40787a(4) =407861a(5) =4078609a(6) =40786087a(7) =407860853a(8) =4078608529a(9) =40786085251a(10) =407860852417

External references