

A062607


Numbers n such that 41^n  40^n is prime.


0



7, 11, 13, 67, 1051, 9257, 9521, 15077, 21851, 53323, 69427
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OFFSET

1,1


COMMENTS

Terms greater than 1000 are often only strong pseudoprimes.
a(12) > 10^5.  Robert Price, Jul 31 2012


LINKS

Table of n, a(n) for n=1..11.


PROG

(PARI) is(n)=ispseudoprime(41^n40^n) \\ Charles R Greathouse IV, Jun 13 2017


CROSSREFS

Cf. A000043, A057468, A059801, A059802, A062572A062666.
Sequence in context: A116442 A191083 A288610 * A018768 A045970 A004235
Adjacent sequences: A062604 A062605 A062606 * A062608 A062609 A062610


KEYWORD

nonn,hard


AUTHOR

Mike Oakes, May 18 2001, May 19 2001


EXTENSIONS

a(8)a(11) (Computed by Adam Marciniec) from Robert Price, Jul 31 2012


STATUS

approved



