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Primes of the form 5n^2 + 6.
1

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

%S 11,131,251,1451,1811,4211,6131,12011,14051,15131,36131,41411,45131,

%T 47051,53051,57251,80651,93851,102251,132851,142811,163811,171131,

%U 174851,206051,210131,231131,271451,285611,315011,335411,383651

%N Primes of the form 5n^2 + 6.

%H Vincenzo Librandi, <a href="/A201484/b201484.txt">Table of n, a(n) for n = 1..5000</a>

%t Select[Table[5n^2+6,{n,0,2000}],PrimeQ]

%o (Magma) [a: n in [0..700] | IsPrime(a) where a is 5*n^2+6];

%K nonn,easy

%O 1,1

%A _Vincenzo Librandi_, Dec 02 2011