A075982 Numbers k such that k^5 + 4^k is prime.

1, 3, 7, 9, 37, 99, 319, 6559, 7249, 18327

Offset

1,2

Links

Table of n, a(n) for n=1..10.

Mathematica

Select[Range[10000], PrimeQ[#^5 + 4^#] &] (* Vincenzo Librandi, Oct 04 2012 *)

Prog

(PARI) is(n)=ispseudoprime(n^5+4^n) \\ Charles R Greathouse IV, Jun 13 2017

Crossrefs

Sequence in context: A031161 A031882 A199190 * A100839 A013624 A053366

Adjacent sequences: A075979 A075980 A075981 * A075983 A075984 A075985

Keyword

nonn,more

Author

Zak Seidov, Oct 17 2002

Extensions

More terms from Ralf Stephan, Mar 25 2003

a(8)-a(9) from Vincenzo Librandi, Oct 04 2012

a(10) from Michael S. Branicky, Jul 13 2023

Status

approved