Numbers k such that 7*(10^(2*k+1)-1)/9 - 5*10^k is prime.
A183178
Numbers k such that 7*(10^(2*k+1)-1)/9 - 5*10^k is prime.
Terms
- a(0) =0a(1) =1a(2) =3a(3) =7a(4) =10a(5) =12a(6) =480a(7) =949a(8) =1945a(9) =7548a(10) =8923
External references
- oeis: A183178