Numbers k such that 7*2^(2*k) - 5*2^k + 1 is prime.
A227446
Numbers k such that 7*2^(2*k) - 5*2^k + 1 is prime.
Terms
- a(0) =0a(1) =1a(2) =3a(3) =13a(4) =39a(5) =539a(6) =2631a(7) =4283a(8) =13595
External references
- oeis: A227446
A227446
Numbers k such that 7*2^(2*k) - 5*2^k + 1 is prime.