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A075982 Numbers n such that n^5+4^n is prime. 0
1, 3, 7, 9, 37, 99, 319, 6559, 7249 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..9.

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

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

STATUS

approved

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Last modified March 31 14:24 EDT 2020. Contains 333151 sequences. (Running on oeis4.)