Numbers k such that (4^k + 5^k)/9 is prime.
A128335
Numbers k such that (4^k + 5^k)/9 is prime.
Terms
- a(0) =5a(1) =7a(2) =19a(3) =29a(4) =61a(5) =137a(6) =883a(7) =1381a(8) =1823a(9) =5227a(10) =25561a(11) =29537a(12) =300893
External references
- oeis: A128335