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Primes of the form 4*n^3-9.
1

%I #14 Sep 20 2024 16:31:47

%S 23,491,2039,8779,27427,31991,97547,131063,157207,171491,821507,

%T 1257719,1371991,1556059,1620887,1972147,2819867,3114743,3650683,

%U 3764759,5619703,6083491,7263383,7812491,9410539,13231787,17643767,24918007

%N Primes of the form 4*n^3-9.

%H Vincenzo Librandi, <a href="/A200734/b200734.txt">Table of n, a(n) for n = 1..1000</a>

%t Select[Table[4n^3-9,{n,2,8000}],PrimeQ]

%o (Magma) [a: n in [2..250] | IsPrime(a) where a is 4*n^3-9];

%K nonn,easy

%O 1,1

%A _Vincenzo Librandi_, Nov 23 2011