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A301520 Numbers k such that 4*k^k + 3 is prime. 5
0, 1, 2, 5, 10, 44, 65, 1424 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

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..8.

MATHEMATICA

Flatten[{0, Select[Range[1000], PrimeQ[4*#^# + 3] &]}] (* Vaclav Kotesovec, Mar 25 2018 *)

PROG

(PARI) for(n=0, 100, if(isprime(4*n^n+3), print1(n", ")))

CROSSREFS

Cf. A110932, A160360, A301519, A301521.

Sequence in context: A173112 A018439 A018451 * A139010 A018472 A082593

Adjacent sequences:  A301517 A301518 A301519 * A301521 A301522 A301523

KEYWORD

nonn,hard,more

AUTHOR

Seiichi Manyama, Mar 23 2018

EXTENSIONS

a(8) from Vaclav Kotesovec, Mar 25 2018

STATUS

approved

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Last modified December 7 09:33 EST 2019. Contains 329843 sequences. (Running on oeis4.)