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 A201602 #6 Sep 08 2022 08:46:01
%S A201602 29,113,449,701,1009,1373,2269,2801,3389,4733,6301,8093,13553,14813,
%T A201602 23549,30493,32369,34301,38333,40433,42589,49393,56701,64513,70001,
%U A201602 78653,81649,84701,100801,114689,125693,137201,149213,161729,166013
%N A201602 Primes of the form 7n^2 + 1.
%H A201602 Vincenzo Librandi, <a href="/A201602/b201602.txt">Table of n, a(n) for n = 1..5000</a>
%t A201602 Select[Table[7n^2+1,{n,0,900}],PrimeQ]
%o A201602 (Magma) [a: n in [0..600] | IsPrime(a) where a is 7*n^2+1];
%K A201602 nonn,easy
%O A201602 1,1
%A A201602 _Vincenzo Librandi_, Dec 03 2011