A328217 Numbers k such that k^(k+1)*(k+1)^k + 1 is prime.

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

Links

Table of n, a(n) for n=1..5.

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

Cf. A000040, A051443.

Sequence in context: A190045 A247035 A069512 * A116639 A220274 A036433

Adjacent sequences: A328214 A328215 A328216 * A328218 A328219 A328220

Keyword

nonn,more

Author

Juri-Stepan Gerasimov, Oct 08 2019

Status

approved