Numbers k such that (7*10^(2*k+1) + 9*10^k - 7)/9 is prime.
A183182
Numbers k such that (7*10^(2*k+1) + 9*10^k - 7)/9 is prime.
Terms
- a(0) =1a(1) =3a(2) =39a(3) =54a(4) =168a(5) =240a(6) =5328a(7) =6159a(8) =24675a(9) =52227a(10) =113887
External references
- oeis: A183182