cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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

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%I A328217 #16 Aug 24 2024 11:44:15
%S A328217 1,2,14,22,120
%N A328217 Numbers k such that k^(k+1)*(k+1)^k + 1 is prime.
%C A328217 a(6) > 10^3.
%C A328217 Numbers k such that A051443(k)+1 is prime. - _Michel Marcus_, Oct 08 2019
%C A328217 a(6) > 10^4, if it exists. - _Michael S. Branicky_, Aug 24 2024
%t A328217 Select[Range[120], PrimeQ[#^(# + 1)*(# + 1)^# + 1] &] (* _Amiram Eldar_, Oct 08 2019 *)
%o A328217 (Magma) [n: n in [1..500] | IsPrime(n^(n+1)*(n+1)^n+1)];
%Y A328217 Cf. A000040, A051443.
%K A328217 nonn,more
%O A328217 1,2
%A A328217 _Juri-Stepan Gerasimov_, Oct 08 2019