Numbers k such that 4^k + k is prime.
A057909
Numbers k such that 4^k + k is prime.
Terms
- a(0) =1a(1) =3a(2) =9a(3) =15a(4) =37a(5) =85a(6) =133a(7) =225a(8) =1233a(9) =12793a(10) =108889
External references
- oeis: A057909
A057909
Numbers k such that 4^k + k is prime.