OFFSET
1,2
COMMENTS
a(20) > 14000. - Daniel Starodubtsev, Apr 17 2020
EXAMPLE
3 is in the sequence because 6^3 + 17 = 233, which is prime.
PROG
(PARI) lista(nn)=for(k=0, nn, if(ispseudoprime(6^k+17), print1(k", ")))
CROSSREFS
KEYWORD
nonn,more,hard,less
AUTHOR
Daniel Starodubtsev, Aug 06 2019
EXTENSIONS
a(17)-a(18) from Daniel Starodubtsev, Mar 16 2020
a(19) from Daniel Starodubtsev, Apr 17 2020
a(20)-a(22) from Michael S. Branicky, Mar 14 2023
STATUS
approved