

A062636


Numbers n such that 70^n  69^n is prime.


0




OFFSET

1,1


COMMENTS

Terms greater than 1000 are often only strong pseudoprimes.
a(6) > 10^5.  Robert Price Jan 15 2014


LINKS

Table of n, a(n) for n=1..5.


PROG

(PARI) is(n)=ispseudoprime(70^n69^n) \\ Charles R Greathouse IV, Jun 13 2017


CROSSREFS

Cf. A000043, A057468, A059801, A059802, A062572A062666.
Sequence in context: A084673 A034388 A131316 * A051254 A095820 A101295
Adjacent sequences: A062633 A062634 A062635 * A062637 A062638 A062639


KEYWORD

nonn,hard,bref


AUTHOR

Mike Oakes, May 18 2001, May 19 2001


EXTENSIONS

a(4)a(5) from Robert Price, Jan 15 2014 (Computer run by Adam Marciniec)


STATUS

approved



