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 A201600 #7 Sep 08 2022 08:46:01
%S A201600 5,11,29,59,101,389,491,1019,1181,1949,2909,3461,5051,8219,8669,10091,
%T A201600 10589,11621,13259,13829,14411,16229,23819,26141,27749,28571,39371,
%U A201600 44381,50789,51899,61211,63659,64901,67421,68699,75269,82139
%N A201600 Primes of the form 6n^2 + 5.
%H A201600 Vincenzo Librandi, <a href="/A201600/b201600.txt">Table of n, a(n) for n = 1..5000</a>
%t A201600 Select[Table[6n^2+5,{n,0,800}],PrimeQ]
%o A201600 (Magma) [a: n in [0..600] | IsPrime(a) where a is 6*n^2+5];
%K A201600 nonn,easy
%O A201600 1,1
%A A201600 _Vincenzo Librandi_, Dec 03 2011