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A182783 Numbers k such that 2*k^4 - 1 is a prime. 4

%I #15 Sep 08 2022 08:45:55

%S 2,5,6,7,8,9,14,16,21,27,28,34,42,44,47,48,50,51,62,63,65,68,70,75,76,

%T 79,82,84,93,96,98,103,106,114,120,121,124,131,133,138,139,147,148,

%U 149,156,166,169,173,174,182,195,197,201,203,216,218,225,229,237,240,243,247,253,275,282,292,299,300,307,309,310

%N Numbers k such that 2*k^4 - 1 is a prime.

%H Vincenzo Librandi, <a href="/A182783/b182783.txt">Table of n, a(n) for n = 1..1000</a>

%t Select[Range[350],PrimeQ[2#^4-1]&] (* _Harvey P. Dale_, Sep 12 2011 *)

%o (Magma) [n: n in [1..1000]| IsPrime(2*n^4-1)]

%Y Cf. A182784, A182785.

%K nonn,easy

%O 1,1

%A _Vincenzo Librandi_, Dec 02 2010

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Last modified March 29 10:22 EDT 2024. Contains 371268 sequences. (Running on oeis4.)