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A301519 Numbers k such that 4*k^k + 1 is prime. 3
0, 1, 2, 3, 7, 25, 7143, 11583 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

a(9) > 20000, if it exists. All terms correspond to certified primes. - Giovanni Resta, Apr 06 2018

LINKS

Table of n, a(n) for n=1..8.

MATHEMATICA

Flatten[{0, Select[Range[1000], PrimeQ[4*#^# + 1] &]}] (* Vaclav Kotesovec, Mar 25 2018 *)

PROG

(PARI) for(n=0, 100, if(isprime(4*n^n+1), print1(n", ")))

CROSSREFS

Cf. A110932, A160600, A301520, A301522.

Sequence in context: A301317 A091230 A063852 * A274692 A308114 A092983

Adjacent sequences:  A301516 A301517 A301518 * A301520 A301521 A301522

KEYWORD

nonn,more

AUTHOR

Seiichi Manyama, Mar 23 2018

EXTENSIONS

a(7)-a(8) from Giovanni Resta, Apr 06 2018

STATUS

approved

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Last modified July 21 17:20 EDT 2019. Contains 325198 sequences. (Running on oeis4.)