Numbers k such that (7^k - 2^k)/5 is prime.
A215487
Numbers k such that (7^k - 2^k)/5 is prime.
Terms
- a(0) =3a(1) =7a(2) =19a(3) =79a(4) =431a(5) =1373a(6) =1801a(7) =2897a(8) =46997a(9) =341063a(10) =508867a(11) =720497a(12) =846913
External references
- oeis: A215487