Numbers n such that (10^n + 1)/11 is a prime.
A001562
Numbers n such that (10^n + 1)/11 is a prime.
Terms
- a(0) =5a(1) =7a(2) =19a(3) =31a(4) =53a(5) =67a(6) =293a(7) =641a(8) =2137a(9) =3011a(10) =268207a(11) =1600787
External references
- oeis: A001562