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A035325 Primes of the form 2^k + k^2 + 1. 5

%I #21 Sep 08 2022 08:44:52

%S 2,101,4241,262469,5846006549323611672814739330865132078623730198149,

%T 6277101735386680763835789423207666416102355444464034549761,

%U 105312291668557186697918027683670432318895095400549111254311024193

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

%C Corresponding k's (A100357) all are multiples of 6. - _Zak Seidov_, Apr 05 2014

%H Vincenzo Librandi, <a href="/A035325/b035325.txt">Table of n, a(n) for n = 1..9</a>

%t Select[Table[2^n + n^2 + 1, {n, 0, 300, 6}], PrimeQ ] (* _Vincenzo Librandi_, Sep 03 2012 *)

%o (Magma) [ a: n in [0..250] | IsPrime(a) where a is 2^n + n^2 + 1 ] // _Vincenzo Librandi_, Sep 03 2012

%Y Cf. A100357 (corresponding n's). - _Zak Seidov_, Apr 05 2014

%K nonn

%O 1,1

%A _N. J. A. Sloane_.

%E More terms from _James A. Sellers_

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Last modified April 23 08:14 EDT 2024. Contains 371905 sequences. (Running on oeis4.)