A201611 - OEIS

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

%S 3,11,131,971,1571,3203,5003,7691,9803,13451,16931,19211,24203,27851,

%T 32771,51203,57803,81611,86531,89891,125003,143651,154571,204803,

%U 207371,247811,273803,288803,339491,356171,387203,401411,480203

%N Primes of the form 8n^2 + 3.

%H Vincenzo Librandi, <a href="/A201611/b201611.txt">Table of n, a(n) for n = 1..5000</a>

%t Select[Table[8n^2+3,{n,0,1000}],PrimeQ]

%o (Magma) [a: n in [0..400] | IsPrime(a) where a is 8*n^2+3];

%K nonn,easy

%O 1,1

%A _Vincenzo Librandi_, Dec 03 2011