a(n) is the largest prime factor of the number made by taking the previous term and duplicating the final digit, a(1) = 1.
A195201
a(n) is the largest prime factor of the number made by taking the previous term and duplicating the final digit, a(1) = 1.
Terms
- a(0) =1a(1) =11a(2) =37a(3) =29a(4) =23a(5) =233a(6) =2333a(7) =23333a(8) =661a(9) =601a(10) =6011a(11) =6679a(12) =997a(13) =907a(14) =313a(15) =241a(16) =2411a(17) =47a(18) =53a(19) =41a(20) =137a(21) =17a(22) =59a(23) =599a(24) =857a(25) =953a(26) =9533a(27) =13619a(28) =19457a(29) =821
External references
- oeis: A195201