This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A201716 #34 Sep 08 2022 08:46:01
%S A201716 23,71,239,359,503,863,1319,1583,1871,2879,3671,5039,8423,9743,11159,
%T A201716 11903,12671,13463,16871,17783,18719,20663,25943,29399,33071,38303,
%U A201716 39671,48383,49919,51479,61343,68399,70223,73943,81671,83663,87719
%N A201716 Primes of the form 3*m^2 - 4.
%C A201716 Primes p such that 3*(p+4) or (p+4)/3 is a square. - _Vincenzo Librandi_, Dec 05 2015, Feb 16 2016
%H A201716 Vincenzo Librandi, <a href="/A201716/b201716.txt">Table of n, a(n) for n = 1..5000</a>
%e A201716 23 is in the sequence because 3 * 3^2 - 4 = 27 - 4 = 23.
%e A201716 71 = 3 * 5^2 - 4.
%e A201716 143 is not in the sequence, because 3 * 7^2 - 4 = 143 but 11 * 13 = 143.
%p A201716 select(isprime, [seq(3*(2*k+1)^2-4, k = 1..1000)]); # _Robert Israel_, Nov 09 2014
%t A201716 Select[Table[3n^2 - 4, {n, 1000}], PrimeQ]
%o A201716 (Magma) [a: n in [1..300] | IsPrime(a) where a is 3*n^2-4];
%o A201716 (PARI) lista(nn) = for (k=0, nn, if (isprime(p=3*k^2-4), print1(p, ", "))); \\ _Michel Marcus_, Nov 19 2014, Feb 16 2016
%Y A201716 Cf. A089682, A201715, A201717, A201718, A201781.
%K A201716 nonn,easy
%O A201716 1,1
%A A201716 _Vincenzo Librandi_, Dec 04 2011