Define f_i as the i-th iterate of A260187. a(n) is the least prime for which f_i(a(n)) is prime for all i such that 0 <= i < n and f_n(a(n)) is not prime.
A258937
Define f_i as the i-th iterate of A260187. a(n) is the least prime for which f_i(a(n)) is prime for all i such that 0 <= i < n and f_n(a(n)) is not prime.
Terms
- a(0) =2a(1) =11a(2) =41a(3) =251a(4) =2579a(5) =32609a(6) =543131a(7) =10243031a(8) =233336819a(9) =6703033091a(10) =207263540933
External references
- oeis: A258937