

A309409


Numbers k such that (37^k + 1)/38 is prime.


0




OFFSET

1,1


COMMENTS

Larger terms correspond to probable primes.


LINKS

Table of n, a(n) for n=1..4.
P. Bourdelais, A Generalized Repunit Conjecture


MATHEMATICA

Do[p=Prime[n]; If[PrimeQ[(37^p + 1)/38], Print[p]], {n, 1, 1000000}]


PROG

(PARI) is(n)=ispseudoprime((37^n+1)/38)


CROSSREFS

Sequence in context: A056252 A274774 A176599 * A291687 A257774 A281386
Adjacent sequences: A309406 A309407 A309408 * A309410 A309411 A309412


KEYWORD

nonn,hard,more


AUTHOR

Paul Bourdelais, Jul 29 2019


STATUS

approved



