Let f(i) = prime( f(i - 1) (modulo 10^n) ) with f(0) = 1; a(n) is the length of the period of the sequence f(i).
A128867
Let f(i) = prime( f(i - 1) (modulo 10^n) ) with f(0) = 1; a(n) is the length of the period of the sequence f(i).
Terms
- a(0) =4a(1) =5a(2) =31a(3) =106a(4) =53a(5) =582a(6) =318a(7) =9528a(8) =11201a(9) =19174a(10) =142177a(11) =315394a(12) =648675
External references
- oeis: A128867