Smallest n-digit prime in which the unit place digit is 1 and the k-th most significant digit is prime (2,3,5,7) if k is prime else is composite (4,6,8,9,0).
A089705
Smallest n-digit prime in which the unit place digit is 1 and the k-th most significant digit is prime (2,3,5,7) if k is prime else is composite (4,6,8,9,0).
Terms
- a(0) =31a(1) =251a(2) =4231a(3) =20231a(4) =420221a(5) =2020231a(6) =42020351a(7) =402020251a(8) =4002020251a(9) =20002020721a(10) =420002020271
External references
- oeis: A089705