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%I #6 Sep 08 2022 08:46:01
%S 13,41,509,1381,5333,19661,32009,48677,70313,119173,202621,500009,
%T 780457,953321,1098509,1826141,2205481,2725897,3429509,3650701,
%U 4121213,7263401,8388617,11453161,12194509,21807113,26578697,30581501,35995657
%N Primes of the form 4n^3+9.
%H Vincenzo Librandi, <a href="/A201121/b201121.txt">Table of n, a(n) for n = 1..3800</a>
%t Select[Table[4n^3+9,{n,0,6000}],PrimeQ]
%o (Magma) [a: n in [0..300] | IsPrime(a) where a is 4*n^3+9]
%K nonn,easy
%O 1,1
%A _Vincenzo Librandi_, Nov 27 2011