Numbers k such that (10^(2*k+1)+18*10^k-1)/9 is prime.
A107123
Numbers k such that (10^(2*k+1)+18*10^k-1)/9 is prime.
Terms
- a(0) =0a(1) =1a(2) =2a(3) =19a(4) =97a(5) =9818
External references
- oeis: A107123
A107123
Numbers k such that (10^(2*k+1)+18*10^k-1)/9 is prime.