

A301521


Numbers k such that 4*k^k  3 is prime.


8




OFFSET

1,1


COMMENTS

Next term, if it exists, is greater than 5000.  Vaclav Kotesovec, Mar 25 2018
Next term, if it exists, is greater than 25000.  Robert Price, Apr 22 2019


LINKS

Table of n, a(n) for n=1..6.


MATHEMATICA

Select[Range[1000], PrimeQ[4*#^#  3] &] (* Vaclav Kotesovec, Mar 25 2018 *)


PROG

(PARI) for(n=0, 100, if(isprime(4*n^n3), print1(n", ")))


CROSSREFS

Cf. A301520, A301870.
Sequence in context: A049915 A244332 A119909 * A097698 A233524 A324331
Adjacent sequences: A301518 A301519 A301520 * A301522 A301523 A301524


KEYWORD

nonn,hard,more


AUTHOR

Seiichi Manyama, Mar 23 2018


EXTENSIONS

a(6) from Vaclav Kotesovec, Mar 25 2018


STATUS

approved



