login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

Primes of the form 9n^3+4.
1

%I #6 Sep 08 2022 08:46:01

%S 13,1129,19777,44221,109507,140629,268123,455881,715567,820129,

%T 2471629,3796879,4108801,9272713,12308683,13687879,15944053,18435451,

%U 25228993,26317867,27437629,32234197,41917171,45001903,49907101,53367673,73085413

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

%H Vincenzo Librandi, <a href="/A201265/b201265.txt">Table of n, a(n) for n = 1..3200</a>

%t Select[Table[9n^3+4,{n,0,7000}],PrimeQ]

%o (Magma) [a: n in [0..400] | IsPrime(a) where a is 9*n^3+4]

%K nonn,easy

%O 1,1

%A _Vincenzo Librandi_, Nov 29 2011