A201849 - OEIS

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

%S 109,1789,2797,4729,8089,11197,17497,28669,34297,38329,40429,44797,

%T 51769,69997,75709,78649,84697,118297,129469,137197,192889,216829,

%U 268909,297049,351229,437497,451609,473197,495289,525529,646909,780889

%N Primes of the form 7n^2 - 3.

%H Vincenzo Librandi, <a href="/A201849/b201849.txt">Table of n, a(n) for n = 1..5000</a>

%t Select[Table[7n^2-3,{n,1,1000}],PrimeQ]

%o (Magma) [a: n in [1..400] | IsPrime(a) where a is 7*n^2-3];

%K nonn,easy

%O 1,1

%A _Vincenzo Librandi_, Dec 06 2011