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A119448 Primes of the form k^k + k^2 + 1. 2

%I #20 Sep 08 2022 08:45:25

%S 2,3,37,285311670733,

%T 1102507499354148695951786433413508348166942596435548101,

%U 3877924263464448622666648186154330754898344901344205917642325627886496385065073

%N Primes of the form k^k + k^2 + 1.

%C The values of k such that k^k + k^2 + 1 is prime are 1, 3, 11, 35, 47, ...

%C 0^0 + 0^2 + 1 = 2. - _Vincenzo Librandi_, Dec 22 2010

%C The next term has 176 digits. - _Harvey P. Dale_, Feb 07 2018

%e a(3) = 11^11 + 11^2 + 1 = 285311670733 is prime.

%t Join[{2},Select[Table[n^n+n^2+1,{n,50}],PrimeQ]] (* _Harvey P. Dale_, Feb 07 2018 *)

%o (Magma) [a: n in [0..250]|IsPrime(a) where a is n^n+n^2+1] // _Vincenzo Librandi_, Dec 22 2010

%Y Cf. A000040, A000312, A120479, A120480, A119264.

%K nonn

%O 1,1

%A _Jonathan Vos Post_, Jul 26 2006

%E 2 added by _Vincenzo Librandi_, Dec 22 2010

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Last modified April 25 11:16 EDT 2024. Contains 371967 sequences. (Running on oeis4.)