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URL: https://oeis.org/A328217

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A328217
Numbers k such that k^(k+1)*(k+1)^k + 1 is prime.
0
1, 2, 14, 22, 120
OFFSET
1,2
COMMENTS
a(6) > 10^3.
Numbers k such that A051443(k)+1 is prime. - Michel Marcus, Oct 08 2019
a(6) > 10^4, if it exists. - Michael S. Branicky, Aug 24 2024
MATHEMATICA
Select[Range[120], PrimeQ[#^(# + 1)*(# + 1)^# + 1] &] (* Amiram Eldar, Oct 08 2019 *)
PROG
(Magma) [n: n in [1..500] | IsPrime(n^(n+1)*(n+1)^n+1)];
CROSSREFS
Sequence in context: A190045 A247035 A069512 * A116639 A220274 A036433
KEYWORD
nonn,more
AUTHOR
STATUS
approved