A062609 Numbers k such that 43^k - 42^k is prime or a strong pseudoprime.

3, 13, 43, 211

Offset

1,1

Comments

a(5) > 10^5 - Robert Price, Dec 24 2012

Links

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

Prog

(PARI) forprime(n=1, 9999, ispseudoprime(43^n-42^n) && print1(n", ")) \\ - M. F. Hasler, Sep 21 2013

Crossrefs

Cf. A000043, A057468, A059801-A059803, A062572-A062608, A215632, A062611-A062666.

Sequence in context: A258776 A201710 A019008 * A004660 A208060 A284194

Adjacent sequences: A062606 A062607 A062608 * A062610 A062611 A062612

Keyword

nonn,hard

Author

Mike Oakes, May 18 2001, May 19 2001

Extensions

Edited by M. F. Hasler, Sep 21 2013

Status

approved