A201612 - OEIS

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

%S 5,13,37,293,397,653,2053,3533,3877,5413,6277,6733,10957,14797,15493,

%T 19213,23333,25997,30757,36997,48677,55117,56453,69197,75277,76837,

%U 86533,98573,100357,109517,117133,129037,139397,143653,154573

%N Primes of the form 8n^2 + 5.

%H Vincenzo Librandi, <a href="/A201612/b201612.txt">Table of n, a(n) for n = 1..5000</a>

%t Select[Table[8n^2+5,{n,0,1000}],PrimeQ]

%o (Magma) [a: n in [0..300] | IsPrime(a) where a is 8*n^2+5];

%K nonn,easy

%O 1,1

%A _Vincenzo Librandi_, Dec 03 2011