Smallest semiprime S starting a chain of exactly n semiprimes from iterating f(S) = 2*S+1.
A114330
Smallest semiprime S starting a chain of exactly n semiprimes from iterating f(S) = 2*S+1.
Terms
- a(0) =6a(1) =4a(2) =38a(3) =289a(4) =145a(5) =203a(6) =2603a(7) =31826a(8) =1157a(9) =3827a(10) =621101a(11) =1388153a(12) =2681114a(13) =2681669a(14) =121360769a(15) =969870257
External references
- oeis: A114330