Numbers k such that (2^k + 3)/5 is prime.
A284285
Numbers k such that (2^k + 3)/5 is prime.
Terms
- a(0) =5a(1) =9a(2) =25a(3) =45a(4) =61a(5) =189a(6) =289a(7) =489a(8) =7065a(9) =42229
External references
- oeis: A284285
A284285
Numbers k such that (2^k + 3)/5 is prime.