

A057190


Numbers n such that (24^n+1)/25 is a prime.


14




OFFSET

1,1


COMMENTS

a(7) > 10^5.  Robert Price, Jun 04 2013


LINKS

Table of n, a(n) for n=1..6.
H. Dubner and T. Granlund, Primes of the Form (b^n+1)/(b+1), J. Integer Sequences, 3 (2000), #P00.2.7.
H. Lifchitz, Mersenne and Fermat primes field


PROG

(PARI) isok(n) = (denominator(p=(24^n+1)/25)==1) && isprime(p); \\ Michel Marcus, Oct 30 2017


CROSSREFS

Sequence in context: A282037 A050562 A321806 * A106674 A184063 A076854
Adjacent sequences: A057187 A057188 A057189 * A057191 A057192 A057193


KEYWORD

nonn,more


AUTHOR

N. J. A. Sloane, Sep 15 2000


STATUS

approved



