OFFSET
1,1
COMMENTS
Union of number 2 and Fermat primes > 3 from A019434; for odd k, the numbers 2^k - 17 are divisible by 3.
Also primes p of the form 2^k + 12*(-1)^k - 11 for k >= 0 because for odd k, the numbers 2^k - 23 are divisible by 3.
Also primes p of the form 2^k + 1/2*(q + 1)*(-1)^k - 1/2*(q - 1) for k >= 0 where q = prime of the form 3m - 1 > 29 from A003627 because for odd k, the numbers 2^k - q are divisible by 3.
Corresponding values of k: 0, 2, 4, 8, 16, ...
PROG
(Magma) [2^n + 9*(-1)^n - 8: n in [0..1000] | IsPrime(2^n + 9*(-1)^n - 8)];
CROSSREFS
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Mar 06 2016
STATUS
approved