A062615 Numbers k such that 49^k - 48^k is prime.

2, 3, 7, 379

Offset

1,1

Comments

Terms greater than 1000 are often only strong pseudoprimes.

a(5) > 10^5. - Robert Price, Dec 03 2012

Links

Table of n, a(n) for n=1..4.

Prog

(PARI) is(n)=ispseudoprime(49^n-48^n) \\ Charles R Greathouse IV, Jun 13 2017

Crossrefs

Cf. A000043, A057468, A059801, A059802, A062572-A062666.

Sequence in context: A100763 A132538 A334726 * A180162 A129907 A046284

Adjacent sequences: A062612 A062613 A062614 * A062616 A062617 A062618

Keyword

nonn,hard

Author

Mike Oakes, May 18 2001, May 19 2001

Status

approved