A075983 Primes of the form n^5 + 4^n.

5, 307, 33191, 321193, 18889465931478650198741, 401734511064747568885490523085290650630550748445707718725843

Offset

1,1

Links

Charles R Greathouse IV, Table of n, a(n) for n = 1..7

Mathematica

Select[Table[n^5+4^n, {n, 500}], PrimeQ] (* Harvey P. Dale, Mar 31 2012 *)

Prog

(PARI) k=0; for(n=1, 20, k=k+1; while(!isprime(k^5+4^k), k++); print1(k^5+4^k", "))

Crossrefs

Sequence in context: A300687 A300610 A301352 * A160071 A094161 A366305

Adjacent sequences: A075980 A075981 A075982 * A075984 A075985 A075986

Keyword

nonn

Author

Zak Seidov, Oct 17 2002

Extensions

Next term has 193 digits.

More terms from Ralf Stephan, Mar 30 2003

Status

approved